View Compilation Error

0_0_28460639_20338.cpp: In function 'int main()':
0_0_28460639_20338.cpp:8:7: error: 'cin' was not declared in this scope
 while(cin>>x>>y&&x&&y){
       ^
0_0_28460639_20338.cpp:15:17: error: 'cout' was not declared in this scope
                 cout<<"0"<<i;
                 ^
0_0_28460639_20338.cpp:16:18: error: 'cout' was not declared in this scope
             else cout<<" 0"<<i;
                  ^
0_0_28460639_20338.cpp:22:17: error: 'cout' was not declared in this scope
                 cout<<i;
                 ^
0_0_28460639_20338.cpp:23:18: error: 'cout' was not declared in this scope
             else cout<<" "<<i;
                  ^
0_0_28460639_20338.cpp:27:9: error: 'cout' was not declared in this scope
         cout<<endl;
         ^
0_0_28460639_20338.cpp:27:15: error: 'endl' was not declared in this scope
         cout<<endl;
               ^