/*
 * malloc  and free use example
 */
#include <stdio.h>
#include <stdlib.h>

int main(void)
{
    int *p;

    p = (int *) malloc(sizeof(int));

    if (p == NULL)
    {
        printf("ERROR: Out of memory\n");
        return 1;
    }

    *p = 5;
    printf("%d\n", *p);

    free(p);

    return 0;
}