foo.cc: In function 'int main()':
foo.cc:20:8: warning: 'stuNo' may be used uninitialized in this function [-Wmaybe-uninitialized]
   20 |  cout<<stuNo<<endl;
      |        ^~~~~

正在同步测试数据，请稍后
[Hydro](https://hydro.ac)提供评测服务