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

int main(void) {
    int roll,numb, c = 0;
    char name[20];
    FILE *p;

    printf("press 1 for creating file & entering customer details.\n");
    printf("press 2 for picking up some variable content.\n> ");
    scanf("%d",&numb);
    switch(numb) {
        case 1:
            printf("enter roll number : ");
            scanf("%d",&roll);
            fflush(stdin);

            printf("enter name : ");
            fgets(name, 20, stdin);

            // PRINTING INTO THE FILE
            p = fopen("siva.txt","w");

            fprintf(p, "%d\n", roll);
            fprintf(p, "%s\n", name);
            break;

        case 2: //READING PARTICULAR CONTENT FROM THE FILE
            p = fopen("siva.txt", "r");

            fscanf(p, "%d",&roll);
            fscanf(p, "%s", name);

            printf("%s\n", name);
            printf("%d\n", roll);
            break;
    }

    fclose(p);
    return 0;
}