Solution for Exercise 22-13

ex2213

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

int main()
{
    struct entry {
        char actor[32];
        int year;
        char title[32];
    };
    struct entry bond2;
    struct entry bond3;
    FILE *a007;

    strcpy(bond2.actor,"Roger Moore");
    bond2.year = 1973;
    strcpy(bond2.title,"Live and Let Die");
    strcpy(bond3.actor,"Pierce Brosnan");
    bond3.year = 1995;
    strcpy(bond3.title,"GoldenEye");

    a007 = fopen("bond.db","a");
    if(!a007)
    {
        puts("SPECTRE wins!");
        exit(1);
    }
    fwrite(&bond2,sizeof(struct entry),1,a007);
    fwrite(&bond3,sizeof(struct entry),1,a007);
    fclose(a007);
    puts("Records written");

    return(0);
}

Notes

* The fopen() function at Line 23 uses the "a" mode to append data to the bond.db file.

* Because the data written isn't in an array, you need two fwrite() functions at Lines 29 and 30 to save the two structure variables to the file. If an array of structures were used instead, then you could write them both by using a single fwrite() function.

Exercise ex2214 →