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//详细的Qt版本+编译器+位数
QString compilerString = "<unknown>";
{
#if defined(Q_CC_CLANG)QString isAppleString;
#if defined(__apple_build_version__)isAppleString = QLatin1String(" (Apple)");
#endifcompilerString = QLatin1String("Clang ") + QString::number(__clang_major__) + QLatin1Char('.') + QString::number(__clang_minor__) + isAppleString;
#elif defined(Q_CC_GNU)compilerString = QLatin1String("GCC ") + QLatin1String(__VERSION__);
#elif defined(Q_CC_MSVC)if (_MSC_VER > 1999) {compilerString = QLatin1String("MSVC <unknown>");} else if (_MSC_VER >= 1930) {compilerString = QLatin1String("MSVC 2022");} else if (_MSC_VER >= 1920) {compilerString = QLatin1String("MSVC 2019");} else if (_MSC_VER >= 1910) {compilerString = QLatin1String("MSVC 2017");} else if (_MSC_VER >= 1900) {compilerString = QLatin1String("MSVC 2015");} else if (_MSC_VER >= 1800) {compilerString = QLatin1String("MSVC 2013");} else if (_MSC_VER >= 1700) {compilerString = QLatin1String("MSVC 2012");} else if (_MSC_VER >= 1600) {compilerString = QLatin1String("MSVC 2010");} else {compilerString = QLatin1String("MSVC <old>");}
#endif
}//拓展知识 查看 QSysInfo 类下面有很多好东西
// qVersion() = QT_VERSION_STR
QString version = QString("%1 %2 %3").arg(qVersion()).arg(compilerString).arg(QString::number(QSysInfo::WordSize));

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