main.c

#include<stdio.h>
#include"include/calloc.h"
#include"include/malloc.h"
#include"include/realloc.h"
#include"include/free.h"

/*
 * Testing code to test all the functions implemented.
 * First two new variables are created and allocated space using malloc()
 * Then the first varaible is freed and malloc() is called again to show that space can be reused.
 * Then calloc() is used to allocate an int array of size 5. Initially the values will be set to 0 by calloc();
 * Then the array is resized to size 10 using realloc()
 */

int main(){

    printf("\n\n");

    printf("Initializing first variable : ");
    int *a = (int*)malloc(sizeof(int));
    *a = 5;
    printf("%p -> %d \n\n",a,*a);

    printf("Initializing second variable : ");
    int *b = (int*)malloc(sizeof(int));
    *b = 10;
    printf("%p -> %d \n\n",b,*b);
    

    free(a);
    printf("Freeing first variable and using that memory block again using malloc() for third variable: ");
    int *c = (int*)malloc(sizeof(int));
    printf("%p -> %d \n\n",c,*c);
    
    printf("Initializing int array of size 5 using calloc() : ");
    int *arr = (int*)calloc(sizeof(int),5);
    printf("%p ->  ",arr);
    for(int i=0; i<5; i++){
        printf(" %d ", *(arr+i));
    }
    printf("\n\n");

    printf("Resizing it to size 10 using realloc(): ");
    arr = (int*)realloc(arr, 10);
    printf("%p ->  ",arr);
    for(int i=0; i<10; i++){
        printf(" %d ", *(arr+i));
    }

    printf("\n\n");

    return 0;
}