/in/foo.cc: In function 'int main()':
/in/foo.cc:7:10: error: 'x' was not declared in this scope
     cin>>x>>y>>z;
          ^
/in/foo.cc:7:13: error: 'y' was not declared in this scope
     cin>>x>>y>>z;
             ^
/in/foo.cc:7:16: error: 'z' was not declared in this scope
     cin>>x>>y>>z;
                ^