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  1. #include <stdio.h>
  2. #include <time.h>
  3.  
  4. void timeCheck(int *clock,int *minutes){
  5.     int hour ;
  6.     int minute ;
  7.     time_t end, start;
  8.     double diff;
  9.  
  10.     start = (time_t)((clock[0] * 60 + clock[1]) * 60) ;
  11.     end = (time_t)((minutes[0] * 60 + minutes[1]) * 60) ;
  12.  
  13.     if( end < start ){
  14.         end += 24 * 60 * 60 ;
  15.     }
  16.  
  17.     diff = difftime(end, start);
  18.  
  19.     hour = (int) diff / 3600;
  20.     minute = (int) diff % 3600 / 60;
  21.     printf("The difference is %d:%d\n", hour, minute);
  22. }
  23.  
  24. int main(void) {
  25.     int hour[] = {22,20};
  26.     int minute[] = {5,40};
  27.  
  28.     printf("Start time %d:%d\n",hour[0],hour[1]);
  29.     printf("Start time %d:%d\n\n",minute[0],minute[1]);
  30.  
  31.     timeCheck(hour,minute);
  32.     return 0;
  33. }
Success #stdin #stdout 0s 2160KB
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stdin
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Standard input is empty
stdout
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Start time 22:20
Start time 5:40

The difference is 7:20
https://ideone.com/B2cEhZ
language:
C (gcc 8.3)
created:
9 years ago
visibility:
public

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