C:\\Qt\\Qt5.2.1\\Tools\\QtCreator\\bin\\conway-master\\mainwindow.cpp:56: error:

Question

 C:QtQt5.2.1ToolsQtCreatorinconway-mastermainwindow.cpp:56: error: 'class QString' has no member named 'toAscii'      file.write(game->dump().toAscii());                              ^ 

 #include <QTextStream> 

 #include <QFileDialog> 

 #include <QDebug> 

 #include <QColor> 

 #include <QColorDialog> 

 #include "mainwindow.h" 

 #include "ui_mainwindow.h" 

 MainWindow::MainWindow(QWidget *parent) : 

     QMainWindow(parent), 

     ui(new Ui::MainWindow), 

     currentColor(QColor("#000")), 

     game(new GameWidget(this)) 

 { 

     ui->setupUi(this); 

     QPixmap icon(16, 16); 

     icon.fill(currentColor); 

     ui->colorButton->setIcon( QIcon(icon) ); 

     connect(ui->startButton, SIGNAL(clicked()), game,SLOT(startGame())); 

     connect(ui->stopButton, SIGNAL(clicked()), game,SLOT(stopGame())); 

     connect(ui->clearButton, SIGNAL(clicked()), game,SLOT(clear())); 

     connect(ui->iterInterval, SIGNAL(valueChanged(int)), game, SLOT(setInterval(int))); 

     connect(ui->cellsControl, SIGNAL(valueChanged(int)), game, SLOT(setCellNumber(int))); 

     connect(game,SIGNAL(environmentChanged(bool)),ui->cellsControl,SLOT(setDisabled(bool))); 

     connect(game,SIGNAL(gameEnds(bool)),ui->cellsControl,SLOT(setEnabled(bool))); 

     connect(ui->colorButton, SIGNAL(clicked()), this, SLOT(selectMasterColor())); 

     connect(ui->saveButton, SIGNAL(clicked()), this, SLOT(saveGame())); 

     connect(ui->loadButton, SIGNAL(clicked()), this, SLOT(loadGame())); 

     ui->mainLayout->setStretchFactor(ui->gameLayout, 8); 

     ui->mainLayout->setStretchFactor(ui->setLayout, 2); 

     ui->gameLayout->addWidget(game); 

 } 

 MainWindow::~MainWindow() 

 { 

     delete ui; 

 } 

 void MainWindow::saveGame() 

 { 

     QString filename = QFileDialog::getSaveFileName(this, 

                                                     tr("Save current game"), 

                                                     QDir::homePath(), 

                                                     tr("Conway's Game *.life Files (*.life)")); 

     if(filename.length() < 1) 

         return; 

     QFile file(filename); 

     if(!file.open(QIODevice::WriteOnly | QIODevice::Truncate)) 

         return; 

     QString s = QString::number(game->cellNumber())+" "; 

     file.write(s.toAscii()); 

     file.write(game->dump().toAscii()); 

     QColor color = game->masterColor(); 

     QString buf = QString::number(color.red())+" "+ 

                   QString::number(color.green())+" "+ 

                   QString::number(color.blue())+" "; 

     file.write(buf.toAscii()); 

     buf.clear(); 

     buf = QString::number(ui->iterInterval->value())+" "; 

     file.write(buf.toAscii()); 

     file.close(); 

 } 

 void MainWindow::loadGame() 

 { 

     QString filename = QFileDialog::getOpenFileName(this, 

                                                     tr("Open saved game"), 

                                                     QDir::homePath(), 

                                                     tr("Conway's Game Of Life File (*.life)")); 

     if(filename.length() < 1) 

         return; 

     QFile file(filename); 

     if(!file.open(QIODevice::ReadOnly)) 

         return; 

     QTextStream in(&file); 

     int sv; 

     in >> sv; 

     ui->cellsControl->setValue(sv); 

     game->setCellNumber(sv); 

     QString dump=""; 

     for(int k=0; k != sv; k++) { 

         QString t; 

         in >> t; 

         dump.append(t+" "); 

     } 

     game->setDump(dump); 

     int r,g,b; // RGB color 

     in >> r >> g >> b; 

     currentColor = QColor(r,g,b); 

     game->setMasterColor(currentColor); // sets color of the dots 

     QPixmap icon(16, 16); // icon on the button 

     icon.fill(currentColor); // fill with new color 

     ui->colorButton->setIcon( QIcon(icon) ); // set icon for button 

     in >> r; // r will be interval number 

     ui->iterInterval->setValue(r); 

     game->setInterval(r); 

 } 

 void MainWindow::selectMasterColor() 

 { 

     QColor color = QColorDialog::getColor(currentColor, this, tr("Select color of figures")); 

     if(!color.isValid()) 

         return; 

     currentColor = color; 

     game->setMasterColor(color); 

     QPixmap icon(16, 16); 

     icon.fill(color); 

     ui->colorButton->setIcon( QIcon(icon) ); 

 } 

Explanation / Answer

which version of Qt you are using

toAscii() method in QString class available only from Qt 4.1 onwards..

please check your Qt Version.

in Qt 5.2.1   toAscii() method is removed ...

Please use toUtf8() method in stead of that....

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