simple problem, not sure what I did:

[ABZB]

Hello,

I declared in my mainwindow.h file:

QListWidgetItem *items_a[10];

under private variables.

I have a member function

void analyze_deck()
{
double total_cards = monster_count + spell_count + trap_count;
//no monsters:
double no_m = nfomf(total_cards - monster_count, total_cards,6);
//no spells
double no_s = nfomf(total_cards - spell_count, total_cards,6);
//no traps
double no_t = nfomf(total_cards - trap_count, total_cards,6);
//at least 1 good
double al1g = 1 - nfomf(total_cards - list_sizes[2], total_cards, 6);
//all bad
double al1b = 1 - nfomf(total_cards - list_sizes[1], total_cards, 6);

*** items_a[1]->setText(QString("%1").arg(no_m));
items_a[3]->setText(QString("%1").arg(no_s));
items_a[5]->setText(QString("%1").arg(no_t));
items_a[7]->setText(QString("%1").arg(al1b));
items_a[9]->setText(QString("%1").arg(al1g));
}

implemented in mainwindow.cpp


the compiler is returning "items_a was not declared in this scope" at the line marked ***. (if i comment out that line, the error occurs at the next line down)

I initialize the items_a[0...9] and add them to the appropriate listwidget further down in the file:

void MainWindow::createV_bx_rslt() //creates a vbox for outputing the data in
{
v_rslt_p = new QVBoxLayout;

QListWidget *rslt_lst = new QListWidget(this);
v_rslt_p->QVBoxLayout::addWidget(rslt_lst);

for(int i = 0; i < 10; i++)
{
items_a[i] = new QListWidgetItem;
rslt_lst->addItem(items_a[i]);
}

items_a[0]->setText(tr("Probability of starting with no Monster cards"));

items_a[2]->setText(tr("Probability of starting with no Spell cards"));

items_a[4]->setText(("Probability of starting with no trap cards"));

items_a[6]->setText(("Probability of starting with a dead hand"));

items_a[8]->setText(tr("Probability of at least one key card in opening hand"));

}

Thank you in advance for your advice.

-ABZB

edit: I attached the .h and .cpp files in question

[rawfool]

I think you have created array of pointers, which actually isn't necessary.
Instead do this:

In .h file
QList <QListWidgetItem *>items_a;
 
In .cpp file -> c'tor
for(int i = 0; i < 10; i++)
{
    items_a.append(new QListWidgetItem);
}
 
Access it using:
items_a.at(i)->setText(tr("Probability of starting with no Monster cards"));
 
Destroy it this way in d'tor:
while (!items_a.isEmpty())
{
    delete items_a.takeFirst();
}

In .h file
QList <QListWidgetItem *>items_a;

In .cpp file -> c'tor
for(int i = 0; i < 10; i++)
{
    items_a.append(new QListWidgetItem);
}

Access it using:
items_a.at(i)->setText(tr("Probability of starting with no Monster cards"));

Destroy it this way in d'tor:
while (!items_a.isEmpty())
{
    delete items_a.takeFirst();
}

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[ABZB]

Thank you for that advice, but that didn't solve the issue. Based on the color-coding by my ide, it seems that when I first initialize the list widget in createV_box_result, items_a is recognized as a variable from the .h file. however, in the void analyze_deck(), items_a is not color-coded at all. I think that for some reason the existence of items_a is not being carried over to analyze_deck(), but I am at a loss as to why.

[Santosh Reddy]

Based on the color-coding by my ide, it seems that when I first initialize the list widget in createV_box_result, items_a is recognized as a variable from the .h file. however, in the void analyze_deck(), items_a is not color-coded at all. I think that for some reason the existence of items_a is not being carried over to analyze_deck(), but I am at a loss as to why.

The color coding as you said is provided by IDE, as a user friendly feature, it has nothing to do with the compiler, and compiler error messages.

Compiler may not recongnize a symbol even if it were colored by the IDE. Compiler and IDE are two different applications, don't compare the output of one with other, they will never match.

[ABZB]

... I didn't write the MainWindow:: before the function... That solved it... Thanks!

[Santosh Reddy]

Do these modification (Basic C++ syntax issue), and also implement the other functions in the code.

//void analyze_deck()
void MainWindow::analyze_deck()
{
...
}
 
//void save_analysis(const std::string &fileName)
void MainWindow::save_analysis(const std::string &fileName)
{
...
}
 
//void read_deck(const QString &fileName)
void MainWindow::read_deck(const QString &fileName)
{
...
}
 
//void refresh_deck()
void MainWindow::refresh_deck()
{
...
}

//void analyze_deck()
void MainWindow::analyze_deck()
{
...
}

//void save_analysis(const std::string &fileName)
void MainWindow::save_analysis(const std::string &fileName)
{
...
}

//void read_deck(const QString &fileName)
void MainWindow::read_deck(const QString &fileName)
{
...
}

//void refresh_deck()
void MainWindow::refresh_deck()
{
...
}

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Move all following to mainwindow.cpp

QString current_file;
double nfomf(int n, int m, int k); //n factorial over m factorial for k terms.
 
int list_sizes[3]; // amount in main/bad/good
 
QListWidget *mn_lst;
int monster_count = 0;// monster/spell/trap
int spell_count = 0;
int trap_count = 0;
int whereami[3]; //main/bad/good

QString current_file;
double nfomf(int n, int m, int k); //n factorial over m factorial for k terms.

int list_sizes[3]; // amount in main/bad/good

QListWidget *mn_lst;
int monster_count = 0;// monster/spell/trap
int spell_count = 0;
int trap_count = 0;
int whereami[3]; //main/bad/good

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[Santosh Reddy]

Your code is missing include directives which could be the problem, show us what all you included in mainwindow.h, and mainwindow.cpp, or better post the exact code, don't tailor it.