View Compilation Error

0_0_16769796_5801.cpp: In function 'int main()':
0_0_16769796_5801.cpp:6:17: error: 'm' was not declared in this scope
     scanf("%d",&m);
                 ^
0_0_16769796_5801.cpp:9:21: error: 'n' was not declared in this scope
         scanf("%d",&n);
                     ^