flat a = 12.123456;
QString str = QString::asprintf(“%.2f,”, a);
printf(“str = %s\n”,str.tolocal8Bit().data());
输出结果:str = 12.12
flat a = 12.123456;
QString str = QString::asprintf(“%.2f,”, a);
printf(“str = %s\n”,str.tolocal8Bit().data());
输出结果:str = 12.12