View Compilation Error

0_0_34067950_26066.cpp: In member function 'void fraction::reduce()':
0_0_34067950_26066.cpp:16:25: error: 'x' was not declared in this scope
         int m = gcd(abs(x), abs(y));
                         ^
0_0_34067950_26066.cpp:16:33: error: 'y' was not declared in this scope
         int m = gcd(abs(x), abs(y));
                                 ^