programmieren-3-c/v5.5/malloc.c

#include <stdlib.h>

int main(void) {
    int* i = (int*)malloc(sizeof(int));
    *i = 42;

    double* d = (double*)malloc(sizeof(double));
    *d = *i;

    free(i);
    i = NULL;

    free(d);
    d = NULL;

}