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

int *foo(void) {
  int *ptr = 0;
  for (int i = 0; i < 5; i++) {
    ptr = calloc(1, sizeof(*ptr));
  }
  ptr = calloc(1, sizeof(*ptr));
  ptr = calloc(1, sizeof(*ptr));
  *ptr = 5;
  return ptr;
}

struct bar {
  int x;
  int *y;
};

int *bar(void) {
  struct bar bar;
  bar.x = 5;
  bar.y = calloc(1, sizeof(int));
  *bar.y = bar.x;
  return bar.y;
}

int main(void) {
  int *x = foo();
  printf("Result of foo(): %d\n", *x);
  x = bar();
  printf("Result of bar(): %d\n", *x);
  return 0;
}