QString myString = "Hello, world!";
QString myString = "Hello, world!"; std::string asciiString = myString.toStdString();
QString myString = QString::fromUtf8("你好世界");
QString myString = "The quick brown fox"; if (myString.contains("brown")) { // do something }In summary, the QString class in C++ provides a powerful tool for manipulating strings, whether they are ASCII or Unicode. It is a part of the Qt library, which offers additional features for developing graphical user interfaces.