Program not running exited with code 0

[gayathrisekaran]

while running my qt code

Running build steps for project qbank...
Configuration unchanged, skipping QMake step.
Starting: /usr/bin/make debug -w
make: Entering directory `/home/tts/Desktop/QbankEditorAllrequirement'
/usr/bin/make -f Makefile.Debug
make[1]: Entering directory `/home/tts/Desktop/QbankEditorAllrequirement'
make[1]: Nothing to be done for `first'.
make[1]: Leaving directory `/home/tts/Desktop/QbankEditorAllrequirement'
make: Leaving directory `/home/tts/Desktop/QbankEditorAllrequirement'
Exited with code 0.

i'm working in qt4.

Running build steps for project qbank...
Configuration unchanged, skipping QMake step.
Starting: /usr/bin/make debug -w
make: Entering directory `/home/tts/Desktop/QbankEditorAllrequirement'
/usr/bin/make -f Makefile.Debug
make[1]: Entering directory `/home/tts/Desktop/QbankEditorAllrequirement'
make[1]: Nothing to be done for `first'.
make[1]: Leaving directory `/home/tts/Desktop/QbankEditorAllrequirement'
make: Leaving directory `/home/tts/Desktop/QbankEditorAllrequirement'
Exited with code 0.

while commiting to db i get the exit status as,

ASSERT: "i >= 0" in file /usr/include/qt4/QtCore/qstring.h, line 875
The program has unexpectedly finished.
/home/tts/Desktop/QbankEditorAllrequirement/qbank exited with code 0

when i debug my code

"The inferior stopped because it received a signal from the Operating system
Signal name : SIGABRT
Signal meaning : SignalAborting"

when i click ok,
it shows the error in my commit.cpp file,
in while loop.
any1 knows wat the error might be.please help me

[Santosh Reddy]

There may be an error in commit.cpp, check the call stack

[gayathrisekaran]

But the same code finely runs in qt3. will you please explain what is call stack.
thanks for your reply

---

Added after 5 minutes:

But the same code finely runs in qt3. will you please explain what is call stack.
thanks for your reply

[Santosh Reddy]

Refer this CallStack.jpg

[gayathrisekaran]

Sorry, may be my question is a silly thing, but i am a beginner in both qt and c++ so please tell me weather in my code also it seems the same or not

Actually my code is


case SHORT:
/*write the parsing stuff ..... for parsing the options member of the object to seperate the statement and
main phrase parts*/
Ques=((Short *)object)->stmt[0];
Question=parseQuestion(Ques); // function called for replacing tilde,cape symbol to angluar brackets
Questemp=Question;
((Short *)object)->stmt[0]=Questemp;
temp = "\"" + chapter + "\", \"" + board + "\", \"" + subject + "\", \"" + temp2.setNum(((baseFillChoose *)object)->pageNo)+ "\", \"" + ((Short *)object)->Queswav + "\",";
temp += " \"" + ((Short *)object)->stmt[0] + "\",\"" + ((Short *)object)->mgif[0] + "\",\"" + ((Short *)object)->mgif1[0] + "\", \"" + ((Short *)object)->ChooseType + "\", \"" +((Short *)object)->misc[0] + "\"";
text12="insert into ShortQues(Chapter,Board,Subject,PageNo,Queswav,Que stion,Q1Gif1,Q1Gif2,Shorttype,StaticGif1) values (" + temp + ");";
cout<<"text12\n"<<text12<<endl;
query = new QSqlQuery("insert into ShortQues(Chapter,Board,Subject,PageNo,Queswav,Que stion,Q1Gif1,Q1Gif2,Shorttype,StaticGif1) values (" + temp + ")");
temp = "";
index = 0;
query = new QSqlQuery("select MAX(QNo) as QNo from ShortQues");
if(!query->first())
{
exit(-2);
}
qNo = (query->value(0)).toInt();

for(i = 0;i<object->getNumOpt();i++)
{
index = 0;
while((((Short *)object)->options[i])[index]!='\0') //here it points
{
index = parseOption(index,((Short *)object)->options[i],stmt1,phrase);
cout<<"index : "<<index<<"\n"<<stmt1<<"\n"<<phrase<<endl;
QString text11;
stmt1temp=stmt1;
cout<<"stmt1temp\n"<<stmt1temp<<endl;
stmt1=stmt1temp;
cout<<"stmt1\n"<<stmt1<<endl;
phrasetemp=phrase;
cout<<"phrasetemp\n"<<phrasetemp<<endl;
phrase=phrasetemp;
cout<<"phrase\n"<<phrase<<endl;
if(index!=-1)
{

text11="insert into ShAnsPts(Statement1,Statement2,Option1,QNo,PointNo ,CorrectNo) values (\"" + stmt1 + "\", NULL,\"" + phrase + "\"," + temp2.setNum(qNo) + "," + temp2.setNum(((Short *)object)->ptno[i+1]) + ",1)";
cout<<"\n\ntext11"<<text11<<endl;

query = new QSqlQuery("insert into ShAnsPts(Statement1,Statement2,Option1,QNo,PointNo ,CorrectNo) values (\"" + stmt1 + "\", NULL,\"" + phrase + "\"," + temp2.setNum(qNo) + "," + temp2.setNum(((Short *)object)->ptno[i+1])+",1)");
}
else {
query = new QSqlQuery("select MAX(APNo) as APNo from ShAnsPts where QNo=" + temp2.setNum(qNo) +"&& PointNo=" + temp2.setNum(((Short *)object)->ptno[i+1]));

if(!query->first())
{
cout<<"There is no main phrase in this point ..... aborting\n";
exit(-2);
}
aPNo = (query->value(0)).toInt();
cout<<"This is apNo values"<<aPNo<<endl;
stmt1=parseQuestion(stmt1); // function called for replacing tilde,cape symbol to angluar brackets
stmt2temp=parseStepNo(stmt1,i,aPNo);
cout<<"\nThis is the apno value required"<<aPNo<<endl;
// stmt2temp=stmt1;
stmt2=stmt2temp;
cout<<"This is STatement2 value"<<stmt2<<endl;
// (((baseFillChoose *)object)->stepno[i+1])=stepval[i];
// cout<<"This is stepmark value"<<stepval[i]<<endl;
query = new QSqlQuery("update ShAnsPts set Statement2 = \"" + stmt2 + "\" where APNo=" + temp2.setNum(aPNo));
// query = new QSqlQuery("update ShAnsPts set StepMark = \"" + ((baseFillChoose *)object)->stepno[i+1] + "\" where APNo=" + temp2.setNum(aPNo));
query = new QSqlQuery("update ShAnsPts set Q1Gif1 = \"" + ((Short *)object)->mgif[i+1] + "\" where APNo=" + temp2.setNum(aPNo));
query = new QSqlQuery("update ShAnsPts set Q1Gif2 = \"" + ((Short *)object)->mgif1[i+1] + "\" where APNo=" + temp2.setNum(aPNo));
query = new QSqlQuery("update ShAnsPts set StaticGif1 = \"" + ((Short *)object)->misc[i+1] + "\" where APNo=" + temp2.setNum(aPNo));
query = new QSqlQuery("update ShAnsPts set voiceover = \"" + ((Short *)object)->voiceovers[i+1] + "\" where APNo=" + temp2.setNum(aPNo));

}
}
}

break;

After entering into the following code

int mainForm:arseOption(int ind,QString option, QString &stmt1, QString &phrase)
{
QTextStream cout(stdout, QIODevice::WriteOnly);
int j = 0;
int index = ind;
cout<<"311 : parseOption : "<<option<<endl;
cout<<"index&&\n"<<index<<endl;
while(option[index] != '|')
{
stmt1[j] = option[index];
cout<<"stmt1[j]\n"<<stmt1[j]<<endl;
if(option[index]=='\0')
{
stmt1[j] = '\0';
cout<<"stmt1[j]\n"<<stmt1[j]<<endl;
option[0] = '\0';
cout<<"option[0]\n"<<option[0]<<endl;
return -1;
}
index++;
j++;
}
stmt1[j] = '\0';
cout<<"stmt1[j]**&\n"<<stmt1[j]<<endl;
stmt1=stmt1.replace( "{sub}","_{");
stmt1=stmt1.replace( "{/sub}","}" );

cout<<"425 : "<<stmt1<<endl;
j = 0;
index++;
while(option[index] != '\\')
{
phrase[j] = option[index];
index++;
j++;
}
phrase=phrase.replace( "{sub}","<sub>" );
phrase=phrase.replace( "{sub}","<sub>" );
cout<<"Phrase value"<<phrase<<endl;
phrase[j] = '\0';
cout<<"436 : "<<phrase<<endl;

return (index + 1);

}

then return to the above while condition

it exit and showing
ASSERT: "i >= 0" in file /usr/include/qt4/QtCore/qstring.h, line 875
The program has unexpectedly finished.
/home/tts/Desktop/QbankEditorAllrequirement/qbank exited with code 0

[Santosh Reddy]

int mainForm:arseOption(int ind,QString option, QString &stmt1, QString &phrase)
{
...
    while(option[index] != '|') //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
    {
        stmt1[j] = option[index];  //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
        cout<<"stmt1[j]\n"<<stmt1[j]<<endl;//<<<<<<<<<<<<<<<<<<<<<
        if(option[index]=='\0')//<<<<<<<<<<<<<<<<<<<<<
        {
            stmt1[j] = '\0';
            cout<<"stmt1[j]\n"<<stmt1[j]<<endl;//<<<<<<<<<<<<<<<<<<<<<
            option[0] = '\0';
            cout<<"option[0]\n"<<option[0]<<endl;//<<<<<<<<<<<<<<<<<<<<<
            return -1;
        }
        index++;
        j++;
    }
...
}

int mainForm:arseOption(int ind,QString option, QString &stmt1, QString &phrase)
{
...
    while(option[index] != '|') //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
    {
        stmt1[j] = option[index];  //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
        cout<<"stmt1[j]\n"<<stmt1[j]<<endl;//<<<<<<<<<<<<<<<<<<<<<
        if(option[index]=='\0')//<<<<<<<<<<<<<<<<<<<<<
        {
            stmt1[j] = '\0';
            cout<<"stmt1[j]\n"<<stmt1[j]<<endl;//<<<<<<<<<<<<<<<<<<<<<
            option[0] = '\0';
            cout<<"option[0]\n"<<option[0]<<endl;//<<<<<<<<<<<<<<<<<<<<<
            return -1;
        }
        index++;
        j++;
    }
...
}

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Refer the comments in code, you are using operator []. What do you think will happen if use stmt[i] or option[index] when stmt and option are empty strings?

[gayathrisekaran]

Sometimes it get entered to db and sometimes not.Will u please tell me wat the problem is?

---

Added after 28 minutes:

while entering the Ques it get parsed in the following code

QString mainForm:arseQuestion(QString &stmt1)
{
QTextStream cout(stdout, QIODevice::WriteOnly);
cout<<"It is coming inside the parse function"<<endl;
stmt1=stmt1.replace( QChar('^'),QChar('<') );
stmt1=stmt1.replace( QChar('~'),QChar('>') );
stmt1=stmt1.replace( "{sub}","_{" );
stmt1=stmt1.replace( "{/sub}","}" );
stmt1=stmt1.replace( "{sup}","^{" );
stmt1=stmt1.replace( "{/sup}","}" );
return(stmt1);
}

And when the options get entered it is nt parsing in the "parseOption" function.
The "parseOption" function also parses the Ques itself, and tat Ques is taken as the stmt value one by one and finally printing as the stmt as[].
The option isprinting as []. Y its taking lik tis pls tell me

[Santosh Reddy]

First use tags to post your code, nobody will be interested to look at your code if it is not readable quickly, (eg. [CODE]....[ /CODE])

[gayathrisekaran]

sorry

case SHORT:
/*write the parsing stuff ..... for parsing the options member of the object to seperate the statement and
main phrase parts*/
Ques=((Short *)object)->stmt[0];
Question=parseQuestion(Ques); // function called for replacing tilde,cape symbol to angluar brackets
Questemp=Question;
((Short *)object)->stmt[0]=Questemp;
temp = "\"" + chapter + "\", \"" + board + "\", \"" + subject + "\", \"" + temp2.setNum(((baseFillChoose *)object)->pageNo)+ "\", \"" + ((Short *)object)->Queswav + "\",";
temp += " \"" + ((Short *)object)->stmt[0] + "\",\"" + ((Short *)object)->mgif[0] + "\",\"" + ((Short *)object)->mgif1[0] + "\", \"" + ((Short *)object)->ChooseType + "\", \"" +((Short *)object)->misc[0] + "\"";
text12="insert into ShortQues(Chapter,Board,Subject,PageNo,Queswav,Que stion,Q1Gif1,Q1Gif2,Shorttype,StaticGif1) values (" + temp + ");";
cout<<"text12\n"<<text12<<endl;
query = new QSqlQuery("insert into ShortQues(Chapter,Board,Subject,PageNo,Queswav,Que stion,Q1Gif1,Q1Gif2,Shorttype,StaticGif1) values (" + temp + ")");
temp = "";
index = 0;
query = new QSqlQuery("select MAX(QNo) as QNo from ShortQues");
if(!query->first())
{
exit(-2);
}
qNo = (query->value(0)).toInt();
 
for(i = 0;i<object->getNumOpt();i++)
{
index = 0;
while((((Short *)object)->options[i])[index]!='\0') //here it points 
{
index = parseOption(index,((Short *)object)->options[i],stmt1,phrase);
cout<<"index : "<<index<<"\n"<<stmt1<<"\n"<<phrase<<endl;
QString text11;
stmt1temp=stmt1;
stmt1=stmt1temp;
phrasetemp=phrase;
phrase=phrasetemp;
if(index!=-1)
{
 
text11="insert into ShAnsPts(Statement1,Statement2,Option1,QNo,PointNo ,CorrectNo) values (\"" + stmt1 + "\", NULL,\"" + phrase + "\"," + temp2.setNum(qNo) + "," + temp2.setNum(((Short *)object)->ptno[i+1]) + ",1)";
cout<<"\n\ntext11"<<text11<<endl;
 
query = new QSqlQuery("insert into ShAnsPts(Statement1,Statement2,Option1,QNo,PointNo ,CorrectNo) values (\"" + stmt1 + "\", NULL,\"" + phrase + "\"," + temp2.setNum(qNo) + "," + temp2.setNum(((Short *)object)->ptno[i+1])+",1)");
}
else {
query = new QSqlQuery("select MAX(APNo) as APNo from ShAnsPts where QNo=" + temp2.setNum(qNo) +"&& PointNo=" + temp2.setNum(((Short *)object)->ptno[i+1]));
 
if(!query->first())
{
cout<<"There is no main phrase in this point ..... aborting\n";
exit(-2);
}
aPNo = (query->value(0)).toInt();
cout<<"This is apNo values"<<aPNo<<endl;
stmt1=parseQuestion(stmt1); // function called for replacing tilde,cape symbol to angluar brackets
stmt2temp=parseStepNo(stmt1,i,aPNo);
cout<<"\nThis is the apno value required"<<aPNo<<endl;
// stmt2temp=stmt1;
stmt2=stmt2temp;
cout<<"This is STatement2 value"<<stmt2<<endl;
// (((baseFillChoose *)object)->stepno[i+1])=stepval[i];
// cout<<"This is stepmark value"<<stepval[i]<<endl;
query = new QSqlQuery("update ShAnsPts set Statement2 = \"" + stmt2 + "\" where APNo=" + temp2.setNum(aPNo));
// query = new QSqlQuery("update ShAnsPts set StepMark = \"" + ((baseFillChoose *)object)->stepno[i+1] + "\" where APNo=" + temp2.setNum(aPNo));
query = new QSqlQuery("update ShAnsPts set Q1Gif1 = \"" + ((Short *)object)->mgif[i+1] + "\" where APNo=" + temp2.setNum(aPNo));
query = new QSqlQuery("update ShAnsPts set Q1Gif2 = \"" + ((Short *)object)->mgif1[i+1] + "\" where APNo=" + temp2.setNum(aPNo));
query = new QSqlQuery("update ShAnsPts set StaticGif1 = \"" + ((Short *)object)->misc[i+1] + "\" where APNo=" + temp2.setNum(aPNo));
query = new QSqlQuery("update ShAnsPts set voiceover = \"" + ((Short *)object)->voiceovers[i+1] + "\" where APNo=" + temp2.setNum(aPNo));
 
}
}
}
 
break;

case SHORT:
/*write the parsing stuff ..... for parsing the options member of the object to seperate the statement and
main phrase parts*/
Ques=((Short *)object)->stmt[0];
Question=parseQuestion(Ques); // function called for replacing tilde,cape symbol to angluar brackets
Questemp=Question;
((Short *)object)->stmt[0]=Questemp;
temp = "\"" + chapter + "\", \"" + board + "\", \"" + subject + "\", \"" + temp2.setNum(((baseFillChoose *)object)->pageNo)+ "\", \"" + ((Short *)object)->Queswav + "\",";
temp += " \"" + ((Short *)object)->stmt[0] + "\",\"" + ((Short *)object)->mgif[0] + "\",\"" + ((Short *)object)->mgif1[0] + "\", \"" + ((Short *)object)->ChooseType + "\", \"" +((Short *)object)->misc[0] + "\"";
text12="insert into ShortQues(Chapter,Board,Subject,PageNo,Queswav,Que stion,Q1Gif1,Q1Gif2,Shorttype,StaticGif1) values (" + temp + ");";
cout<<"text12\n"<<text12<<endl;
query = new QSqlQuery("insert into ShortQues(Chapter,Board,Subject,PageNo,Queswav,Que stion,Q1Gif1,Q1Gif2,Shorttype,StaticGif1) values (" + temp + ")");
temp = "";
index = 0;
query = new QSqlQuery("select MAX(QNo) as QNo from ShortQues");
if(!query->first())
{
exit(-2);
}
qNo = (query->value(0)).toInt();

for(i = 0;i<object->getNumOpt();i++)
{
index = 0;
while((((Short *)object)->options[i])[index]!='\0') //here it points 
{
index = parseOption(index,((Short *)object)->options[i],stmt1,phrase);
cout<<"index : "<<index<<"\n"<<stmt1<<"\n"<<phrase<<endl;
QString text11;
stmt1temp=stmt1;
stmt1=stmt1temp;
phrasetemp=phrase;
phrase=phrasetemp;
if(index!=-1)
{

text11="insert into ShAnsPts(Statement1,Statement2,Option1,QNo,PointNo ,CorrectNo) values (\"" + stmt1 + "\", NULL,\"" + phrase + "\"," + temp2.setNum(qNo) + "," + temp2.setNum(((Short *)object)->ptno[i+1]) + ",1)";
cout<<"\n\ntext11"<<text11<<endl;

query = new QSqlQuery("insert into ShAnsPts(Statement1,Statement2,Option1,QNo,PointNo ,CorrectNo) values (\"" + stmt1 + "\", NULL,\"" + phrase + "\"," + temp2.setNum(qNo) + "," + temp2.setNum(((Short *)object)->ptno[i+1])+",1)");
}
else {
query = new QSqlQuery("select MAX(APNo) as APNo from ShAnsPts where QNo=" + temp2.setNum(qNo) +"&& PointNo=" + temp2.setNum(((Short *)object)->ptno[i+1]));

if(!query->first())
{
cout<<"There is no main phrase in this point ..... aborting\n";
exit(-2);
}
aPNo = (query->value(0)).toInt();
cout<<"This is apNo values"<<aPNo<<endl;
stmt1=parseQuestion(stmt1); // function called for replacing tilde,cape symbol to angluar brackets
stmt2temp=parseStepNo(stmt1,i,aPNo);
cout<<"\nThis is the apno value required"<<aPNo<<endl;
// stmt2temp=stmt1;
stmt2=stmt2temp;
cout<<"This is STatement2 value"<<stmt2<<endl;
// (((baseFillChoose *)object)->stepno[i+1])=stepval[i];
// cout<<"This is stepmark value"<<stepval[i]<<endl;
query = new QSqlQuery("update ShAnsPts set Statement2 = \"" + stmt2 + "\" where APNo=" + temp2.setNum(aPNo));
// query = new QSqlQuery("update ShAnsPts set StepMark = \"" + ((baseFillChoose *)object)->stepno[i+1] + "\" where APNo=" + temp2.setNum(aPNo));
query = new QSqlQuery("update ShAnsPts set Q1Gif1 = \"" + ((Short *)object)->mgif[i+1] + "\" where APNo=" + temp2.setNum(aPNo));
query = new QSqlQuery("update ShAnsPts set Q1Gif2 = \"" + ((Short *)object)->mgif1[i+1] + "\" where APNo=" + temp2.setNum(aPNo));
query = new QSqlQuery("update ShAnsPts set StaticGif1 = \"" + ((Short *)object)->misc[i+1] + "\" where APNo=" + temp2.setNum(aPNo));
query = new QSqlQuery("update ShAnsPts set voiceover = \"" + ((Short *)object)->voiceovers[i+1] + "\" where APNo=" + temp2.setNum(aPNo));

}
}
}

break;

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int mainForm:arseOption(int ind,QString option, QString &stmt1, QString &phrase)
{
QTextStream cout(stdout, QIODevice::WriteOnly);
int j = 0;
int index = ind;
cout<<"311 : parseOption : "<<option<<endl;
cout<<"index&&\n"<<index<<endl;
while(option[index] != '|')
{
stmt1[j] = option[index];
cout<<"stmt1[j]\n"<<stmt1[j]<<endl;
if(option[index]=='\0')
{
stmt1[j] = '\0';
cout<<"stmt1[j]\n"<<stmt1[j]<<endl;
option[0] = '\0';
cout<<"option[0]\n"<<option[0]<<endl;
return -1;
}
index++;
j++;
}
stmt1[j] = '\0';
cout<<"stmt1[j]**&\n"<<stmt1[j]<<endl;
stmt1=stmt1.replace( "{sub}","<sub>");
stmt1=stmt1.replace( "{/sub}","</sub>" );
 
cout<<"425 : "<<stmt1<<endl;
j = 0;
index++;
while(option[index] != '\\')
{
phrase[j] = option[index];
index++;
j++;
}
phrase=phrase.replace( "{sub}","<sub>" );
phrase=phrase.replace( "{sub}","<sub>" );
cout<<"Phrase value"<<phrase<<endl;
phrase[j] = '\0';
cout<<"436 : "<<phrase<<endl;
 
return (index + 1);
 
}

int mainForm:arseOption(int ind,QString option, QString &stmt1, QString &phrase)
{
QTextStream cout(stdout, QIODevice::WriteOnly);
int j = 0;
int index = ind;
cout<<"311 : parseOption : "<<option<<endl;
cout<<"index&&\n"<<index<<endl;
while(option[index] != '|')
{
stmt1[j] = option[index];
cout<<"stmt1[j]\n"<<stmt1[j]<<endl;
if(option[index]=='\0')
{
stmt1[j] = '\0';
cout<<"stmt1[j]\n"<<stmt1[j]<<endl;
option[0] = '\0';
cout<<"option[0]\n"<<option[0]<<endl;
return -1;
}
index++;
j++;
}
stmt1[j] = '\0';
cout<<"stmt1[j]**&\n"<<stmt1[j]<<endl;
stmt1=stmt1.replace( "{sub}","<sub>");
stmt1=stmt1.replace( "{/sub}","</sub>" );

cout<<"425 : "<<stmt1<<endl;
j = 0;
index++;
while(option[index] != '\\')
{
phrase[j] = option[index];
index++;
j++;
}
phrase=phrase.replace( "{sub}","<sub>" );
phrase=phrase.replace( "{sub}","<sub>" );
cout<<"Phrase value"<<phrase<<endl;
phrase[j] = '\0';
cout<<"436 : "<<phrase<<endl;

return (index + 1);

}

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QString mainForm:arseQuestion(QString &stmt1)
{
QTextStream cout(stdout, QIODevice::WriteOnly);
cout<<"It is coming inside the parse function"<<endl;
stmt1=stmt1.replace( QChar('^'),QChar('<') );
stmt1=stmt1.replace( QChar('~'),QChar('>') );
stmt1=stmt1.replace( "{sub}","<sub>" );
stmt1=stmt1.replace( "{/sub}","</sub>" );
stmt1=stmt1.replace( "{sup}","<sup>" );
stmt1=stmt1.replace( "{/sup}","</sup>" );
return(stmt1);
}

QString mainForm:arseQuestion(QString &stmt1)
{
QTextStream cout(stdout, QIODevice::WriteOnly);
cout<<"It is coming inside the parse function"<<endl;
stmt1=stmt1.replace( QChar('^'),QChar('<') );
stmt1=stmt1.replace( QChar('~'),QChar('>') );
stmt1=stmt1.replace( "{sub}","<sub>" );
stmt1=stmt1.replace( "{/sub}","</sub>" );
stmt1=stmt1.replace( "{sup}","<sup>" );
stmt1=stmt1.replace( "{/sup}","</sup>" );
return(stmt1);
}

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[Santosh Reddy]

What do you think will this statement will do "stmt1[j] = '\0';"

You are null terminating a QString with '\0', you don't have do it. All such assignments in your code will to crash your application one day or other.

Either user all char * (C strings), or user all QStrings (and use them the way they are supposed to be used).

I recommend to spend some time reading some Qt documentation and example, before writing such complicated statements for simple operations on at-least QString.

by the way there are lot of variable which I cannot even image the type.
what is type of object?
what is type of baseFillChoose?
what is type of temp2?
and so may things...

[ChrisW67]

ASSERT: "i >= 0" in file /usr/include/qt4/QtCore/qstring.h, line 875
The program has unexpectedly finished.
/home/tts/Desktop/QbankEditorAllrequirement/qbank exited with code 0

You don't say what version of Qt you are using. In my Qt 4.8.2 source the only place in qstring.h with that Q_ASSERT statement implies that your code is attempting to retrieve a character from a string using a negative index. That is, somewhere you use code like:

x = string[i];
// or
x = string.at(i);

x = string[i];
// or
x = string.at(i);

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the value of 'i' is negative. This is exactly the sort of thing Santosh has been asking you to consider.

But the same code finely runs in qt3.

The code will run without stopping if you compile a release version because the index idiot checks are not done. This is not the same thing as "finely runs". The program will still be broken in unpredictable ways.

will you please explain what is call stack.

When you run the program in your debugger it will stop the first time you try to access the string with a negative index. The Qt Creator panel that Santosh identified contains what is called a "backtrace", "stack trace", or "call stack". The first line is the last bit of code to execute, the line after that is where that block of code was called form, the line after that is where that block of code was called from etc... Read down the list until the first line that is in one of your source files. That is where your problem started. In Qt Creator you can double-click on that line and the "Locals and expressions" will display all the variables in scope at that time... find the problem here.

If you are not using Qt Creator you need to find the equivalent of the backtrace and variable inspection facilities in you IDE... they all have them.

Aside from that your constant, unsafe, C-style casting of the variable "object" to different types is just asking for trouble.

[gayathrisekaran]

The "baseFillChoose" is a class and is just to declare the pageno etc...

class baseFillChoose: public base
{
    public:
    QString stmt[2];
    QString options[150];
    QString voiceovers[150];
    QString misc[150];
    QString mgif[150];	
    QString mgif1[150];
    int ptno[150]; 
    QString chapter; 
    QString Queswav;
    QString Queslist;
    QString ChooseType;
    int pageNo,qNo,correctNo;
    int apno[150];
    int qnumber;
    QString stepno[150];
    QString stepval[150]; 
    baseFillChoose();
    virtual bool checkFilled();
    virtual int getNumStmt();
    virtual int getNumOpt();
    virtual int getNumVoiceOvers();
    virtual int getNumMisc();
    virtual int getNumMgifs();
    virtual int getNumMgifs1();
 
    virtual ~baseFillChoose();    
 
};
 
/* fillups class */
class FillUps  :  public baseFillChoose {};
 
/* choose class */
class Choose :  public baseFillChoose{};
 
/* short answers class */
class Short : public baseFillChoose 
{
 
};
 
/* long answers class */
class Long : public baseFillChoose 
{
 
};
 
 
/* match class */
class basematch : public baseFillChoose
{
 public:
 
  QString word[2];
  QString matchword[2];
  QString matchid[2];
  QString voiceovers[2];
  QString mgif[2];
  QString mgif1[2];
  QString ChooseType;
  QString Queswav;
  basematch();
 
  virtual bool checkFilled();
  virtual bool checkMatchFilled();
  virtual int getNumStmt();
  virtual int getNumOpt();
  virtual int getNumVoiceOvers();
  virtual int getNumMgifs();
  virtual int getNumMgifs1();
  virtual ~basematch();
};
 
class Match : public basematch{};

class baseFillChoose: public base
{
    public:
    QString stmt[2];
    QString options[150];
    QString voiceovers[150];
    QString misc[150];
    QString mgif[150];	
    QString mgif1[150];
    int ptno[150]; 
    QString chapter; 
    QString Queswav;
    QString Queslist;
    QString ChooseType;
    int pageNo,qNo,correctNo;
    int apno[150];
    int qnumber;
    QString stepno[150];
    QString stepval[150]; 
    baseFillChoose();
    virtual bool checkFilled();
    virtual int getNumStmt();
    virtual int getNumOpt();
    virtual int getNumVoiceOvers();
    virtual int getNumMisc();
    virtual int getNumMgifs();
    virtual int getNumMgifs1();

    virtual ~baseFillChoose();    

};

/* fillups class */
class FillUps  :  public baseFillChoose {};

/* choose class */
class Choose :  public baseFillChoose{};

/* short answers class */
class Short : public baseFillChoose 
{

};

/* long answers class */
class Long : public baseFillChoose 
{

};


/* match class */
class basematch : public baseFillChoose
{
 public:

  QString word[2];
  QString matchword[2];
  QString matchid[2];
  QString voiceovers[2];
  QString mgif[2];
  QString mgif1[2];
  QString ChooseType;
  QString Queswav;
  basematch();

  virtual bool checkFilled();
  virtual bool checkMatchFilled();
  virtual int getNumStmt();
  virtual int getNumOpt();
  virtual int getNumVoiceOvers();
  virtual int getNumMgifs();
  virtual int getNumMgifs1();
  virtual ~basematch();
};

class Match : public basematch{};

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The following code is in same file commitdb.cpp.

case SHORT:
      object = new Short(); // store the values from dom tree to objects
      ((baseFillChoose *)object)->pageNo = pageNo;
      ((baseFillChoose *)object)->ChooseType = ChooseType;
      ((baseFillChoose *)object)->Queswav = Queswav;
       ((Short *)object)->qnumber = qnumber;
      ((Short *)object)->stmt[0]="";
      ((Short *)object)->stmt[0] = ((listListNodes.item(0).cloneNode()).firstChild()).nodeValue();
       ((Short *)object)->mgif[0] = (((listListNodes.item(0)).cloneNode()).toElement()).attribute("mgif");
       ((Short *)object)->mgif1[0] = (((listListNodes.item(0)).cloneNode()).toElement()).attribute("mgif1");
       ((Short *)object)->misc[0] = (((listListNodes.item(0)).cloneNode()).toElement()).attribute("misc");
      /*getting options*/
 
        i = 0;
        cout<<"172: enter..... SHort\n";
        while(i<listListNodes.count())
        {
          ((Short *)object)->options[i] = ((listListNodes.item(i)).cloneNode()).firstChild().nodeValue();
          ((Short *)object)->voiceovers[i+1] = (((listListNodes.item(i)).cloneNode()).toElement()).attribute("voiceover");
          ((Short *)object)->mgif[i+1] = (((listListNodes.item(i)).cloneNode()).toElement()).attribute("mgif");
          ((Short *)object)->mgif1[i+1] = (((listListNodes.item(i)).cloneNode()).toElement()).attribute("mgif1");
          ((Short *)object)->misc[i+1] = (((listListNodes.item(i)).cloneNode()).toElement()).attribute("misc");
          ((Short *)object)->ptno[i+1] = (((listListNodes.item(i)).cloneNode()).toElement()).attribute("ptno").toInt();
          ((Short *)object)->apno[i+1] = (((listListNodes.item(i)).cloneNode()).toElement()).attribute("apno").toInt();
         i++;
        }
       object->stmtStartPara = 0;
       object->optStartPara = object->getNumStmt() + 1;
       object->endPara = object->optStartPara + object->getNumOpt();
 
        break;

case SHORT:
      object = new Short(); // store the values from dom tree to objects
      ((baseFillChoose *)object)->pageNo = pageNo;
      ((baseFillChoose *)object)->ChooseType = ChooseType;
      ((baseFillChoose *)object)->Queswav = Queswav;
       ((Short *)object)->qnumber = qnumber;
      ((Short *)object)->stmt[0]="";
      ((Short *)object)->stmt[0] = ((listListNodes.item(0).cloneNode()).firstChild()).nodeValue();
       ((Short *)object)->mgif[0] = (((listListNodes.item(0)).cloneNode()).toElement()).attribute("mgif");
       ((Short *)object)->mgif1[0] = (((listListNodes.item(0)).cloneNode()).toElement()).attribute("mgif1");
       ((Short *)object)->misc[0] = (((listListNodes.item(0)).cloneNode()).toElement()).attribute("misc");
      /*getting options*/

        i = 0;
        cout<<"172: enter..... SHort\n";
        while(i<listListNodes.count())
        {
          ((Short *)object)->options[i] = ((listListNodes.item(i)).cloneNode()).firstChild().nodeValue();
          ((Short *)object)->voiceovers[i+1] = (((listListNodes.item(i)).cloneNode()).toElement()).attribute("voiceover");
          ((Short *)object)->mgif[i+1] = (((listListNodes.item(i)).cloneNode()).toElement()).attribute("mgif");
          ((Short *)object)->mgif1[i+1] = (((listListNodes.item(i)).cloneNode()).toElement()).attribute("mgif1");
          ((Short *)object)->misc[i+1] = (((listListNodes.item(i)).cloneNode()).toElement()).attribute("misc");
          ((Short *)object)->ptno[i+1] = (((listListNodes.item(i)).cloneNode()).toElement()).attribute("ptno").toInt();
          ((Short *)object)->apno[i+1] = (((listListNodes.item(i)).cloneNode()).toElement()).attribute("apno").toInt();
         i++;
        }
       object->stmtStartPara = 0;
       object->optStartPara = object->getNumStmt() + 1;
       object->endPara = object->optStartPara + object->getNumOpt();

        break;

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