View Compilation Error

0_0_32029642_5348.cpp: In function 'int main()':
0_0_32029642_5348.cpp:4:9: error: 'cin' was not declared in this scope
 int a,b;cin>>a>>b;
         ^
0_0_32029642_5348.cpp:5:1: error: 'cout' was not declared in this scope
 cout<<a+b<<endl;
 ^
0_0_32029642_5348.cpp:5:12: error: 'endl' was not declared in this scope
 cout<<a+b<<endl;
            ^