dynamic memory allocation

PHOTO EMBED

Fri Jun 10 2022 18:48:38 GMT+0000 (Coordinated Universal Time)

Saved by @KanishqJ8 

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

int main()
{
    // //Use of malloc
    // int *ptr;
    // int n;
    // printf("Enter the size of the array you want to create\n");
    // scanf("%d", &n);

    // ptr = (int *)malloc(n * sizeof(int));
    // for (int i = 0; i < n; i++)
    // {
    //     printf("Enter the value no %d of this array\n",i);
    //    scanf("%d", &ptr[i]);
    // }

    // for (int i = 0; i < n; i++)
    // {
    //     printf("The value at %d of this array is %d\n",i, ptr[i]);
    // }

    //Use of calloc
    int *ptr;
    int n;
    printf("Enter the size of the array you want to create\n");
    scanf("%d", &n);

    ptr = (int *)calloc(n ,  sizeof(int));
    for (int i = 0; i < n; i++)
    {
        printf("Enter the value no %d of this array\n",i);
       scanf("%d", &ptr[i]);
    }

    for (int i = 0; i < n; i++)
    {
        printf("The value at %d of this array is %d\n",i, ptr[i]);
    }

    //Use of realloc
    printf("Enter the size of the new array you want to create\n");
    scanf("%d", &n);

    ptr = (int *)realloc(ptr ,  n*sizeof(int));
    for (int i = 0; i < n; i++)
    {
        printf("Enter the new value no %d of this array\n",i);
       scanf("%d", &ptr[i]);
    }

    for (int i = 0; i < n; i++)
    {
        printf("The new value at %d of this array is %d\n",i, ptr[i]);
    }

    free(ptr);
    
    
    return 0;
}
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