Qt中使用随机数

新建Empty qmake project，命名为UseRand

UseRand.pro

SOURCES += \
    main.cpp

QT += core

main.cpp

#include <QTime>
#include <QTextStream>

const int RAND_POS = ;
const int DOT_SIZE = ;

int main()
{
    QTextStream out(stdout);

    QTime time = QTime::currentTime();
    qsrand((uint) time.msec());

    int r = qrand() % RAND_POS;
    int x = (r * DOT_SIZE);

    out << RAND_POS << endl;
    out << x << endl;

    return ;
}