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

struct unicorn_counter { int num; };

int main() {

    struct unicorn_counter* p_unicorn_counter;

    int* run_calc2 = (int*)malloc(sizeof(int));
    *run_calc2 = 0;

    int* run_calc = (int*)malloc(sizeof(int));
    *run_calc = 0;

    free(run_calc2);
        printf("%08x\n", *run_calc2);
    free(run_calc);
        printf("%08x\n", *run_calc);

    p_unicorn_counter = (unicorn_counter*)malloc(sizeof(struct unicorn_counter));
    p_unicorn_counter->num = 42;

    if (*run_calc) 
        WinExec("calc.exe", 0);

    printf("%08x\n", *run_calc);
}