合并字符串
第一种
Qstring str1 = "hello "; str1 = str1 + “world”; qDebug() << str1;
QString str2 = "I love "; str2 += “you!”; cout << str1.toStdString() << endl << str2.toStdString() << endl;
第二种
QString str3 = "Welcome "; QString str4 = "to "; str3.append(str4);
第三种
QString str5; str5 = QString(“I bought %1 pounds %2 apples”).arg(10).arg(“red”);
第四种
QString str6; sr6 = str6.asprintf(“%s”, “welcome”); QByteArray ba = str6.toLocal8Bit(); const char * c_str = ba.data(); str6 = QString::asprintf(“%s %s %s”, c_str, “to”, “the future!”);