[백준] 1408번 : 24 - C

https://www.acmicpc.net/problem/1408

#include<stdio.h>
#include <string.h>
#include <stdlib.h>

int main() {
    char n[10];
    char m[10];
    scanf("%s %s",n,m);
    
    char* att[4]={NULL};
    char* arr[4]={NULL};
    int i=0;
    
    char* pt=strtok(n,":");
    while(pt!=NULL){
        att[i]=pt;
        i++;
        pt=strtok(NULL,":");
    }
    i=0;
    char* pr=strtok(m,":");
    while(pr!=NULL){
        arr[i]=pr;
        i++;
        pr=strtok(NULL,":");
    }
    
    int hour=atoi(arr[0])-atoi(att[0])+23;
    int min=atoi(arr[1])-atoi(att[1])+59;
    int sec=atoi(arr[2])-atoi(att[2])+60;
    
    if(sec>=60){
          sec-=60;
          min+=1;
      }
    if(min>=60){
          min-=60;
          hour+=1;
      }
    if(hour>=24){
          hour-=24;
      }
      
    printf("%02d:%02d:%02d",hour,min,sec);
}