ASCII Number to Strings & Chars

[wysota]

well, sometimes the help does not provide example its hard to understand.

The help is not an almanach of examples, it's a means to learn how things work by reading it and applying the knowledge gained in practise in your own code.

The error you got is a C++ error, Qt help has nothing to do with this. When you get that fixed, analyze your code and think what will be the ultimate result of your code. I'll simplify it for you so it's easier to read:

QStringList result;
result << "something" << "somethingelse";
while(!input.atEnd()) {
  ui->aLine->setText(result.at(1));
}

QStringList result;
result << "something" << "somethingelse";
while(!input.atEnd()) {
  ui->aLine->setText(result.at(1));
}

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Please focus on subsequent iterations of the while loop.

[ttimt]

hmmm.... it seems the problem is QStringList results have nothing in it? Hopefully im right
And when i use canReadLine(), the program actually outputted cant read line

QStringList result;
    result << "Something" << "abc";
    QFile input("configp.dll");
 
if (input.open(QIODevice::ReadOnly )) {
 
        if(input.canReadLine()){
 
            ui->hLine->setText("can read");
 
        }else{
 
            //EDITED : removed this line QApplication::processEvents();
            ui->hLine->setText("cant read line"); //outputted this " can't read line "
            }
 
            while (!input.atEnd()){
 
                     QByteArray line = input.readLine().simplified(); //trimmed to simplified
                     QString foo;                       //actually which line of code chris provided converted ascii numbers to char?
 
                        foreach(QByteArray num, line.split(' ')) {
                       foo.append( QChar(num.toShort()) ); // is it this .toShort?
                       }
                result << foo;// if use line->setText() here also output same..
            }
           ui->aLine->setText(result.at(0)); // this output Something
 
           ui->fLine->setText(result.at(1)); //this output abc not anything from the file

QStringList result;
    result << "Something" << "abc";
    QFile input("configp.dll");

if (input.open(QIODevice::ReadOnly )) {

        if(input.canReadLine()){

            ui->hLine->setText("can read");

        }else{

            //EDITED : removed this line QApplication::processEvents();
            ui->hLine->setText("cant read line"); //outputted this " can't read line "
            }

            while (!input.atEnd()){

                     QByteArray line = input.readLine().simplified(); //trimmed to simplified
                     QString foo;                       //actually which line of code chris provided converted ascii numbers to char?
 
                        foreach(QByteArray num, line.split(' ')) {
                       foo.append( QChar(num.toShort()) ); // is it this .toShort?
                       }
                result << foo;// if use line->setText() here also output same..
            }
           ui->aLine->setText(result.at(0)); // this output Something

           ui->fLine->setText(result.at(1)); //this output abc not anything from the file

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Edited : if i add these code below, it actually shows "can read"

if (input.open(QIODevice::ReadOnly )) {
char c;
input.getChar(&c);
 if(input.canReadLine()){
            ui->hLine->setText("can read");
        }else{
            ui->hLine->setText("cant read line");
        }

if (input.open(QIODevice::ReadOnly )) {
char c;
input.getChar(&c);
 if(input.canReadLine()){
            ui->hLine->setText("can read");
        }else{
            ui->hLine->setText("cant read line");
        }

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EDITED: AND HEY, AFTER HOURS OF CODING, I MANGED TO LET IT shows up on aLine But (didn't know i put it inside while loop)after showing up, it still goes runtime error, so i guess i gonna figure out what wysota(hope i spell it correct) is saying

EDITED: I actually found i duplicated settext that caused error. it's working now but figuring out how to output only available line. By the way, will moderator ban for too many edits? I still have some problems with rename. qdir wont work too

EDITED: it now shows runtime error again.
EDITED: i actually jumped setText() from 0 to 3 where i only wanna jump 0 to 2, NOTE the rename still doesn't work

QFile chk("configp.dll");
    chk.open(QIODevice::ReadOnly);
    if(chk.exists()){
 
        QFile exs("configp1.dll");
                if(exs.open(QIODevice::ReadOnly))
                exs.remove();   //this can delete, works very well
 
 
        chk.rename("configp1.dll"); // it wont rename
 
    }else{

QFile chk("configp.dll");
    chk.open(QIODevice::ReadOnly);
    if(chk.exists()){

        QFile exs("configp1.dll");
                if(exs.open(QIODevice::ReadOnly))
                exs.remove();   //this can delete, works very well


        chk.rename("configp1.dll"); // it wont rename

    }else{

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