View Compilation Error

0_0_33278410_14179.cpp: In function 'int main()':
0_0_33278410_14179.cpp:8:9: error: 'a' was not declared in this scope
    cin>>a>>b;
         ^
0_0_33278410_14179.cpp:8:12: error: 'b' was not declared in this scope
    cin>>a>>b;
            ^