foo.cc: In function ‘int a(int)’:
foo.cc:10:1: warning: no return statement in function returning non-void [-Wreturn-type]
   10 | }
      | ^
foo.cc:3:5: warning: infinite recursion detected [-Winfinite-recursion]
    3 | int a(int m)
      |     ^
foo.cc:8:19: note: recursive call
    8 |         if(j!=0) a(j);
      |                  ~^~~

正在同步测试数据，请稍后