1026.程序运行时间
时间转化：60进制转化

#include <iostream>
#define CLK_TCK 100
using namespace std;

int main()
{
    int c1,c2;
    cin>>c1>>c2;
    double x=(c2-c1)/CLK_TCK;
    if(int(x)!= x)x+=1;
    printf("%02d:%02d:%02d\n",int(x/3600),int(x/60)%60,int(x)%60);
    return 0;
}