#include <stdio.h>
#include <stdlib.h>

int main() {
    // Ask for enough memory to hold one int
    int *ptr = malloc(sizeof(int));

    if (ptr == NULL) {
        printf("Memory request failed.\n");
        return 1;
    }

    *ptr = 42;                 // store a value in that memory
    printf("Value: %d\n", *ptr);

    free(ptr);                 // give the memory back
    return 0;
}