Thread: Looping when outputting to a file

I'm sure its a problem of where the statement are located in my while loop, but all that gets inputted in my ouput file is the persons ssn. Now the ssn is on the line it should be. The input file's data is seperated by colons, which I'm using to sort the data. The input file looks like this:

Code:

name:major:gradyr:social:dob

Then once the data is sorted, it is sent to a output file under the appropriate column like this:

Code:

name        social      dob       major       gradyr
-------        -------      -----      --------      ---------

This is my program:

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;
 	};
     
     int y;
	char buf[80], *p, *x;	     /* 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);
     }
     
     fgets(buf, 80, in);
     
     while(! feof(in)) {
             
          p = buf;
          x = strchr(p,':');
          
          while(x != NULL) {
          
               *x = '\0';
               strcpy(s->name, p);
               strcpy(s->curr, p);
               s->gradyr = atoi(p);
		     s->ssn = atoi(p);
		     strcpy(s->dob, p);
               p = x + 1;
               x = strchr(p,':');
          }
          
          fprintf(out, "%s", s->name);
          fprintf(out, "%-3d-%2d-%4d", s->ssn / 1000000, (s->ssn / 10000) % 100, s->ssn % 10000);
          
          for(y = 0;y < 3;y++)
		     fputc(' ', out);
               fputs(s->dob, out);
          
          fprintf(out, "%-4s", s->curr);
          fprintf(out, "%d\n", s->gradyr);
          fgets(buf, 80, in);
     }
     
     fclose(out);
     fclose(in);
	free(s);
     printf ("Press ENTER to continue.\n");
     getchar ();
     return 0;     
}

I modified my code to what you suggested and my output file looks like this:

Code:

0  - 0-   0       0
0  - 0-   0       0
0  - 0-   0       0
0  - 0-   0       0
0  - 0-   0       0

This is my program with the changes:

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;
 	};
     
     int y;
	char buf[80], *p, *x;	     /* 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);
     }
     
     fgets(buf, 80, in);
     
     while(! feof(in)) {
             
          p = buf;
          
          while(x != NULL) {
          
               x = strchr(p,':');
               *x = '\0';
               strcpy(s->name, p);
               x = strchr(p,':');
               *x = '\0';
               strcpy(s->curr, p);
               x = strchr(p,':');
               *x = '\0';
               s->gradyr = atoi(p);
               x = strchr(p,':');
               *x = '\0';
		     s->ssn = atoi(p);
		     x = strchr(p,':');
               *x = '\0';
		     strcpy(s->dob, p);
               p = x + 1;
               x = strchr(p,':');
          }
          
          fprintf(out, "%s", s->name);
          fprintf(out, "%-3d-%2d-%4d", s->ssn / 1000000, (s->ssn / 10000) % 100, s->ssn % 10000);
          
          for(y = 0;y < 3;y++)
		     fputc(' ', out);
               fputs(s->dob, out);
          
          fprintf(out, "%-4s", s->curr);
          fprintf(out, "%d\n", s->gradyr);
          fgets(buf, 80, in);
     }
     
     fclose(out);
     fclose(in);
	free(s);
     printf ("Press ENTER to continue.\n");
     getchar ();
     return 0;     
}

I got the code working but I'm missing the curr value. Its missing from the output file.