sizeof.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main(int argc, char **argv)
{
	size_t size;
	scanf("%lu", &size);
	int *arr = (int *)malloc(size * sizeof(int));
	memset(arr, 0, sizeof(arr));
	for (unsigned long i = 0; i < size; i++) {
		printf("Val: %d\n", arr[i]);
	}
	return 0;
}