#include <stdlib.h>	// For malloc()
#include <stdio.h>

int main () {
	// Points to an integer, right now points to nothing
	int *a = NULL;

	a = malloc(sizeof(int));	// Allocate sizeof(int) bytes, 4 bytes on most machines
	// Right now *a (what a points to) contains uninitialized data
	printf ("%d\n", *a);
	// Assign something to the memory we allocated
	*a = 10;
	printf ("%d\n", *a);

	// When you're through with your memory, deallocate it
	// and assign NULL to the pointer
	// If you forget to deallocate it, it's called a memory leak
	// Also, remember not to call free() on anything that wasn't
	// returned by malloc()
	free(a);
	a = NULL;

	return 0;
}