Exercise 9-1 time conversion (15 points)

This question requires the preparation of procedures , With hh:mm:ss Output in the format of... After a given time n Time value after seconds （ exceed 23:59:59 From 0 The clock starts at ）.

Input format ：

Enter in the first line with hh:mm:ss The format of gives the start time , The second line gives the number of whole seconds n（<60）.

Output format ：

The output is given on one line hh:mm:ss Result time in format .

sample input ：

11:59:40
30

sample output ：

12:00:10

The code is as follows ：

#include<stdio.h>
int main()
{
    int hour=0,minute=0,second=0,n;
    scanf("%d:%d:%d",&hour,&minute,&second);
    scanf("%d",&n);
    second+=n;
    if(second>=60){
        minute++;
        second-=60;
    }
    if(minute>=60){
          hour++;
        minute-=60;
    }
    if(hour>=24){
        hour-=24;
    }
    printf("%02d:%02d:%02d",hour,minute,second);
    return 0;
}