1  void foo(void);
       2  
       3  int main(void)
       4  {
       5     foo ();
       6  
       7     for (;;)
       8  	;
       9  }
      10  
      11  int a;
      12  
      13  void foo1(void)
      14  {
      15  	a = 1;
      16  }
      17  
      18  void foo2(void)
      19  {
      20  	a = 2;
      21  }
      22  
      23  void foo3(void)
      24  {
      25  	a = 3;
      26  }
      27  
      28