Solution for Exercise 22-15

ex2215

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main()
{
    struct entry {
        char actor[32];
        int year;
        char title[32];
    };
    struct entry bond;
    FILE *a007;
    int count=0;

    a007 = fopen("bond.db","r");
    if(!a007)
    {
        puts("SPECTRE wins!");
        exit(1);
    }
    while(fread(&bond,sizeof(struct entry),1,a007))
    {
        printf("%s\t%d\t%s\n",
            bond.actor,
            bond.year,
            bond.title);
        if(ftell(a007) > sizeof(struct entry))
            rewind(a007);
        count++;
        if(count>10) break;
    }
    fclose(a007);

    return(0);
}

Notes

* Sample output (assuming that the bond.db file exists):

Sean Connery 1962 Dr. No Roger Moore 1973 Live and Let Die Sean Connery 1962 Dr. No Roger Moore 1973 Live and Let Die Sean Connery 1962 Dr. No Roger Moore 1973 Live and Let Die Sean Connery 1962 Dr. No Roger Moore 1973 Live and Let Die Sean Connery 1962 Dr. No Roger Moore 1973 Live and Let Die Sean Connery 1962 Dr. No

You never get to see Mr. Brosnan's entry thanks to the tell() and rewind() functions.

Exercise ex2216 →