View Compilation Error

0_0_24915958_29515.cpp: In function 'int main()':
0_0_24915958_29515.cpp:7:14: error: 'A' was not declared in this scope
         cin>>A>>B;
              ^
0_0_24915958_29515.cpp:7:17: error: 'B' was not declared in this scope
         cin>>A>>B;
                 ^