View Compilation Error

0_0_23597484_1708.cpp: In function 'int main()':
0_0_23597484_1708.cpp:8:17: error: 'm' was not declared in this scope
   scanf("%d%d",&m,&n);
                 ^
0_0_23597484_1708.cpp:8:20: error: 'n' was not declared in this scope
   scanf("%d%d",&m,&n);
                    ^