View Compilation Error

0_0_19636364_30597.cpp: In function 'int main()':
0_0_19636364_30597.cpp:9:20: error: 'm' was not declared in this scope
             cin >> m >> n;
                    ^
0_0_19636364_30597.cpp:9:25: error: 'n' was not declared in this scope
             cin >> m >> n;
                         ^