View Compilation Error

0_0_23257947_20612.cpp:1:1: error: 'include' does not name a type
 include <iostream>  
 ^
0_0_23257947_20612.cpp: In function 'int main()':
0_0_23257947_20612.cpp:15:12: error: 'cin' was not declared in this scope
     while( cin>>test && test )  
            ^
0_0_23257947_20612.cpp:31:9: error: 'cout' was not declared in this scope
         cout<<step<<" "<<arr[1]<<endl;  
         ^
0_0_23257947_20612.cpp:31:34: error: 'endl' was not declared in this scope
         cout<<step<<" "<<arr[1]<<endl;  
                                  ^