小编Dav*_*vid的帖子

我正在关注http://doc.qt.io/qt-5/qtwidgets-widgets-calculator-example.html 中的Qt Calculator 示例。我遇到了下面的代码。

for (int i = 0; i < NumDigitButtons; ++i) {
    digitButtons[i] = createButton(QString::number(i), SLOT(digitClicked()));
}

Button *pointButton = createButton(tr("."), SLOT(pointClicked()));
Button *changeSignButton = createButton(tr("\302\261"), SLOT(changeSignClicked()));

Button *backspaceButton = createButton(tr("Backspace"), SLOT(backspaceClicked()));
Button *clearButton = createButton(tr("Clear"), SLOT(clear()));
Button *clearAllButton = createButton(tr("Clear All"), SLOT(clearAll()));

Button *clearMemoryButton = createButton(tr("MC"), SLOT(clearMemory()));
Button *readMemoryButton = createButton(tr("MR"), SLOT(readMemory()));
Button *setMemoryButton = createButton(tr("MS"), SLOT(setMemory()));
Button *addToMemoryButton = createButton(tr("M+"), SLOT(addToMemory()));

Button *divisionButton = createButton(tr("\303\267"), SLOT(multiplicativeOperatorClicked()));
Button *timesButton = createButton(tr("\303\227"), SLOT(multiplicativeOperatorClicked()));
Button *minusButton = …