主()
{
char s[24];
int秒;
scanf("%d ",& ampsec);
s2hms(秒,秒);
printf("%s\n ",s);
}s2hms(char* str,int sec)
int h,m,s;
h =秒/3600;
m =秒/60 - 60*小時;
s = sec-3600 * h-60 * m;
sprintf(str," %d:%d:%d ",h,m,s);
}