运行 ID: 734

Main.cc: In function ‘int main()’:
Main.cc:4:5: error: ‘cin’ was not declared in this scope
     cin>>a>>b>>c;
     ^~~
Main.cc:4:5: note: suggested alternative: ‘main’
     cin>>a>>b>>c;
     ^~~
     main
Main.cc:6:9: error: ‘cout’ was not declared in this scope
         cout<<"1"<