whytho.c

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

    int main() {
      int *p = (int*)malloc(sizeof(int));
      int *q = (int*)realloc(p, sizeof(int));
      *p = 1;
      *q = 2;
      if (p == q)
        printf("%d %d\n", *p, *q);
    }