/in/foo.cc: In function 'int system()':
/in/foo.cc:9:18: error: 'i' was not declared in this scope
   while(cin>>lie[i])
                  ^
/in/foo.cc:15:3: error: 'i' was not declared in this scope
 n=i-1;
   ^
/in/foo.cc:38:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^