append.c

//program to append records to a file

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

int main(void)
{
    struct record
    {
        char name[20];
        int roll;
        int marks;
    } student;
    FILE *fp;
    int choice = 1;
    fp = fopen("stu", "ab"); //append in append mode
    if (fp == NULL)
    {
        printf("Error in openning file\n");
        exit(1);
    }
    /*//program to append records to a file*/
    while (choice == 1)
    {
        printf("Enter name: ");
        scanf("%s", student.name);
        printf("Enter roll no : ");
        scanf("%d", &student.roll);
        printf("Enter marks: ");
        scanf("%d", &student.marks);
        fwrite(&student, sizeof(student), 1, fp);
        printf("Want to enter more ?(1 for yes/ 0 for no) : ");
        scanf("%d", &choice);
    }
    fclose(fp);
    return 0;
}