1026. 程序运行时间(15)

#include<stdio.h>

#define CLK_TCK 100

int main()
{
int c1,c2;
float t;
int h,m,s;

scanf("%d %d",&c1,&c2);

t = (c2-c1)*1.0/CLK_TCK;
//时
h = (int)(t/3600);
if (h>=1)
printf("%02d:",h);
else
printf("00:");
//分
t = t-h*3600;
m = (int)(t/60);
if (m>=1)
printf("%02d:",m);
else
printf("00:");
//秒 (int)(数字+0.5)为四舍五入
s = t-m*60+0.5;
printf("%02d",s);

return 0;
}