Output file contains extra data

When I look at my output file to my program the ssn has the first 3 numbers printed, then the whole social printed after it so it looks like:

Code:

234-24367-8765

I can't see where I went wrong. Here is what i got:

Code:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
 
int main () {
 
     struct stuinfo {
          char    name[30];
         int    ssn;
         char    dob[11];
         char    curr[4];
         int    gradyr;
     };
     
     char    buf[80];         /* file buffer area */
     FILE    *in;             /* input file stream pointer */
     FILE    *out;        /* output file stream pointer */
     struct stuinfo *s;
         
     s = malloc(sizeof(struct stuinfo));
     in = fopen("d6.dat", "r");
     
     if(in == NULL) {
           perror("fopen:     d6.dat");
           exit(1);
     }
     
     out = fopen("d6.out", "w");
     
     if(out == NULL) {
           perror("fopen:     d6.out");
           exit(1);
     }
     
     fprintf(out, "Student Name                 SSN         DOB       Curr      Grad Yr\n");
     fprintf(out, "------------                 ---         ---       ----      -------\n");      
     
     while( fgets(buf,sizeof(buf),in) != 0) {
             
         strcpy(s->name,strtok(buf,":"));
         strcpy(s->curr,strtok(0,":"));
         s->gradyr = atoi(strtok(0,":"));
         s->ssn = atoi(strtok(0,":"));
         strcpy(s->dob,strtok(0,":"));
         fputs(s->name, out);
         fprintf(out, "%3d-%2d-%4d", s->ssn / 1000000, s->ssn / 10000, s->ssn % 10000);
         fputs(s->dob, out);
         fputs(s->curr, out);
         fprintf(out, "%6d\n", s->gradyr);
         printf("%s\n%s\n%d\n%d\n%s\n", s->name, s->curr, s->gradyr, s->ssn, s->dob);
    }

     fclose(out);
     fclose(in);
     printf ("Press ENTER to continue.\n");
     getchar ();
     return 0;     
}

And what is the exact output your expecting? It'd be helpful to know so you can get some help.

> s->ssn / 10000
How about
(s->ssn / 10000) % 100

If you're just trying to extract two digits from it.

Thanks!