#include <QApplication> #include <QLabel> #include <QDate> #include <QLayout> int main(int argc, char *argv[]) {     QApplication a(argc, argv);     QLabel *label = new QLabel;     QDate currentDate = QDate::currentDate();     QDate kaoyanri(2015,1,7);     qint64 tianshui = currentDate.daysTo(kaoyanri);     QString tianshu = QString::number(tianshui);     QString string("离考研还有<font color='red';><b>");     QString tian("</b></font>天");     string = string + tianshu + tian;     label->setText(string);     label->setWindowTitle("考研倒计时");     QFont font;     font.setPointSize(30);     label->setFont(font);     label->resize(300,43);     label->show();     return a.exec(); }