Programming

#include <stdio.h>
/*
typedef struct
{
      char name[40];
      int number;
      float balance;
} acct_info_t;
*/
int main()
{
        FILE *fptr;
        fptr = fopen("acct_info", "r");
        int magic = 5;

        fseek(fptr,3,SEEK_SET);
        fread(&magic,sizeof(int),1,fptr);

        printf("%i\n", magic);
        fclose(fptr);
}

od -t u1 acct_info | head -1

#include <stdio.h>
typedef struct
{
      char name[40];
      int number;
      float balance;
} acct_info_t;
int main(int argc, char * argv[])
{
//      printf("Enter record #(number).\n");

        FILE *fptr;
        fptr = fopen("acct_info", "r");
        acct_info_t acct;
        size_t a = sizeof(acct_info_t), b = argc;

        fseek(fptr,8 + a*b,SEEK_SET);
        fread(&acct,a,b,fptr);

        printf("%s\n", acct.name);
        fclose(fptr);
}

fread(&acct,a,b,fptr);