10_indexedFile.c

/*
    10. Write a C program to simulate the indexed file allocation strategy.
*/

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

int main() {
    int f[50], index[50], i, n, st, len, j, c, k, ind, count = 0;
    for(i = 0; i < 50; i++) {
        f[i] = 0;
    }
    x: printf("Enter the index block: ");
    scanf("%d", &ind);
    if(f[ind] != 1) {
        printf("Enter number of blocks needed and number of files for the index %d on the disk : \n", ind);
        scanf("%d", &n);
    }
    else {
        printf("%d index is already allocated \n",ind);
        goto x;
    }
    y: count = 0;
    for(i = 0; i < n; i++) {
        scanf("%d", &index[i]);
        if(f[index[i]] == 0)
            count++;
    }
    if(count == n) {
        for(j = 0; j < n; j++) {
            f[index[j]]=1;
        }
        printf("Allocated\n");
        printf("File Indexed\n");
        for(k = 0; k < n; k++) {
            printf("%d-------->%d : %d\n", ind, index[k], f[index[k]]);
        }
    } else {
        printf("File in the index is already allocated \n");
        printf("Enter another file indexed");
        goto y;
    }
    printf("Do you want to enter more file(Yes - 1/No - 0): ");
    scanf("%d", &c);
    if(c == 1) {
        goto x;
    } else {
        exit(0);
    }
    return 0;
}