calloc.c

/*
 * “calloc” or “contiguous allocation” method in C is used to dynamically allocate the specified number of blocks of memory of the specified type. it is very much similar to malloc() but has two different points and these are:
 * It initializes each block with a default value ‘0’.
 * It has two parameters or arguments as compare to malloc().
 *
 * 
 */
#include <stdio.h>
#include <stdlib.h>
 
int main()
{
    int* ptr;
    int n, i;
    n = 5;
    printf("Enter number of elements: %d\n", n);
    ptr = (int*)calloc(n, sizeof(int));
    if (ptr == NULL) {
        printf("Memory not allocated.\n");
        exit(0);
    }
    else {
        printf("Memory successfully allocated using calloc.\n");
        for (i = 0; i < n; ++i) {
            ptr[i] = i + 1;
        }
        printf("The elements of the array are: ");
        for (i = 0; i < n; ++i) {
            printf("%d, ", ptr[i]);
        }
    }
    return 0;
}