Run id: 80562

Main.cc: In function 'int main()':
Main.cc:21:10: error: 'aa' was not declared in this scope
  cout << aa;
          ^
Main.cc:7:6: warning: unused variable 'nb' [-Wunused-variable]
  int nb,mb;
      ^
Main.cc:7:9: warning: unused variable 'mb' [-Wunused-variable]
  int nb,mb;
         ^