C++类电子时钟

没有讲解必要 

#include <iostream>
#include <windows.h>
#include <iomanip>
using namespace std;
class clock
{
    public:
        clock(int h=0,int m=0,int s=0): hour(h),minute(m),second(s) {}
        void run()
        {
            while(true)
            {
                show();
                Sleep(1000);
                move_s();
            }
        }

    private:
        int hour;
        int minute;
        int second;
        void show()
        {
            system("cls");
            cout<<setw(2)<<setfill('0')<<hour<<':';
            cout<<setw(2)<<setfill('0')<<minute<<':';
            cout<<setw(2)<<setfill('0')<<second;;
        }
        void move_s()
        {
            second++;
            minute+=second/60;
            second%=60;
            hour+=minute/60;
            minute%=60;
            hour%=24;
        }
};
int main()
{
    clock swatch;
    swatch.run();

    return 0;
}