Nougat 7.0  |  7.0.0_r31
C++程序  |  16行  |  186 B 

#include <stdio.h>

#pragma weak undef_data

extern int undef_data;
int *ptr_to_data = &undef_data;

int
main (void)
{
  if (ptr_to_data == NULL)
    printf ("PASSED\n");

  return 0;
}