implementing malloc in C

#include<stdio.h>

void* Malloc(int );

main(){

int size = 16;

int *a = NULL;

a = (int *)Malloc(size);

int i = 0;

for(i = 0; i < 4; i ++){

a[i] = i;

printf(“a[%d] = %d\n”,i,i);

}

}

void* Malloc(int size) {

int s = size/sizeof(char);

int array[s];

int i = 0;

for(i = 0; i < s; i ++){

array[i] = NULL;

}

return (void *)array;

}