View Compilation Error

0_0_14462032_22409.cpp: In function 'int main()':
0_0_14462032_22409.cpp:25:14: error: 'a' was not declared in this scope
       cin >> a  >> b;
              ^
0_0_14462032_22409.cpp:25:20: error: 'b' was not declared in this scope
       cin >> a  >> b;
                    ^