QString & String
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- QString str = "User: ";
- str += userName + "\n";
- str = "User: ";
- str.append(userName);
- str.append("\n");
- str.sprintf("%s %.1f%%", "perfect competition", 100.0);
- str = QString("%1 %2 (%3s-%4s)")
- .arg("permissive").arg("society").arg(1950).arg(1970);
- QString str = QString::number(54.3);
- QString str;
- str.setNum(54.3);
- bool ok;
- double d = str.toDouble(&ok);
- if(ok)
- {
- // do something...
- } else {
- // do something...
- }
- QString x = "Nine pineapples";
- QString y = x.mid(5, 4); // y == "pine"
- QString z = x.mid(5); // z == "pineapples"
- QString x = "Pineapple";
- QString y = x.left(4); // y == "Pine"
- QString x = "sticky question";
- QString y = "sti";
- x.indexOf(y); // returns 0
- x.indexOf(y, 1); // returns 10
- x.indexOf(y, 10); // returns 10
- x.indexOf(y, 11); // returns -1
- if (url.startsWith("http:") && url.endsWith(".png"))
- {
- }
- if (url.left(5) == "http:" && url.right(4) == ".png")
- {
- }
- str += " (1870)";
- printf("User: %s\n", str.toAscii().data());
- printf("User: %s\n", qPrintable(str));
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