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qt_example.cpp~
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qt_example.cpp~
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#include <QtGui>
int main (int argc, char* argv[]) {
QApplication app(argc, argv);
QTextStream cout(stdout);
// Declarations of variables
int answer = 0;
do {
// local variables to the loop:
int factArg = 0;
int fact(1);
factArg = QInputDialog::getInt(0, "Factorial Calculator",
"Factorial of:", 1);
cout << "User entered: " << factArg << endl;
int i=2;
while (i <= factArg) {
fact = fact * i;
++i;
}
QString response = QString("The factorial of %1 is %2.\n%3")
.arg(factArg).arg(fact)
.arg("Compute another factorial?");
answer = QMessageBox::question(0, "Play again?", response,
QMessageBox::Yes | QMessageBox::No);
} while (answer == QMessageBox::Yes);
return EXIT_SUCCESS;
}