I have written the following program in C language:

//Modulo and time difference

include<stdio.h>

include<stdlib.h>

int main() { int d1,d2;//Days int h1,h2;//Hours int m1,m2;//Minutes int s1,s2;//Seconds int nodates; int i; long int totalsec1,totalsec2,diffday,diff; int date_arr,hourarr,*minarr,*sec_arr; int rem,min,sec,hr;

printf("\nEnter the number of dates:\n");
    scanf("%d",&no_dates);//3

    date_arr = (int*)malloc(sizeof(int)*no_dates);
    hour_arr = (int*)malloc(sizeof(int)*no_dates);
    min_arr = (int*)malloc(sizeof(int)*no_dates);
    sec_arr = (int*)malloc(sizeof(int)*no_dates);

    printf("\nEnter %d dates:\n",no_dates);

    for(i=0;i<no_dates;i++)
    {
            scanf("%d %d %d %d %d %d %d %d",&d1,&h1,&m1,&s1,&d2,&h2,&m2,&s2);//

            diff_day = d2-d1;
            date_arr[i] = diff_day;

            total_sec1 = (h1*3600)+(m1*60)+s1;

            total_sec2 = (h2*3600)+(m2*60)+s2;

            if(total_sec1>total_sec2)
                diff = total_sec1 - total_sec2;
            else
                diff = total_sec2 - total_sec1;

            hr = diff/3600;
            hour_arr[i] = hr;

            rem = diff%3600;

            min = rem/60;
            sec = rem%60;
            min_arr[i] = min;

            sec_arr[i] = sec;

            min = 0;
            hr = 0;
            sec = 0;
            rem = 0;


    }

    printf("\nThe results are as follows:\n");

    for(i=0;i<no_dates;i++)
    {
        printf("(%d %d %d %d)\t",date_arr[i],hour_arr[i],min_arr[i],sec_arr[i]);
    }


return 0;

}

My output was: Enter the number of dates: 12

Enter 12 dates: 4 1 57 54 18 2 46 31 7 11 20 3 15 19 51 13 2 14 34 58 10 20 0 1 13 1 36 35 28 23 1 32 7 4 50 6 24 22 37 3 10 15 47 25 29 17 6 12 5 13 36 48 26 7 53 38 20 0 37 43 28 18 23 55 0 13 15 27 19 10 23 32 6 13 31 40 20 13 13 3 25 1 41 25 28 6 33 38 6 0 38 25 28 15 22 53

The results are as follows: (14 0 48 37) (8 8 31 10) (8 5 25 3) (15 21 24 57) (17 17 46 57) (19 1 18 47) (21 5 43 10) (8 17 46 12) (19 2 51 55) (14 0 18 37) (3 4 52 13) (22 14 44 28)

All values except (21 5 43 10) (19 2 51 55) (14 0 18 37) are CORRECT......

If there was an issue with the logic of my program, the entire output must be wrong...

However, despite all my efforts I am unable to figure out what is the issue with the code.

Any suggestions for improvement will be greatly apperciated.