View Compilation Error

0_0_34269538_20752.cpp: In function 'int main()':
0_0_34269538_20752.cpp:5:10: error: 'a' was not declared in this scope
     cin>>a>>b;
          ^
0_0_34269538_20752.cpp:5:13: error: 'b' was not declared in this scope
     cin>>a>>b;
             ^