View Compilation Error

0_0_38629493_6486.cpp: In function 'int main()':
0_0_38629493_6486.cpp:68:13: error: 'mx' was not declared in this scope
     cout << mx;
             ^~
0_0_38629493_6486.cpp:68:13: note: suggested alternative: 'mp'
     cout << mx;
             ^~
             mp