View Compilation Error

0_0_35272452_25312.cpp:1:1: error: 'include' does not name a type
 include<bits/stdc++.h>
 ^
0_0_35272452_25312.cpp: In function 'int main()':
0_0_35272452_25312.cpp:9:5: error: 'cin' was not declared in this scope
     cin>>a>>b;
     ^
0_0_35272452_25312.cpp:10:5: error: 'cout' was not declared in this scope
     cout<<gcd(a,b);
     ^