View Compilation Error

0_0_30115967_4365.cpp: In function 'int main()':
0_0_30115967_4365.cpp:62:50: error: 'x' was not declared in this scope
                                maxx=max(max(maxx,x),y);
                                                  ^
0_0_30115967_4365.cpp:62:53: error: 'y' was not declared in this scope
                                maxx=max(max(maxx,x),y);
                                                     ^