View Compilation Error

0_0_13739051_13862.cpp: In function 'int main()':
0_0_13739051_13862.cpp:25:12: error: 'a' was not declared in this scope
         if(a==0&&b==0)
            ^
0_0_13739051_13862.cpp:25:18: error: 'b' was not declared in this scope
         if(a==0&&b==0)
                  ^