View Compilation Error

0_0_27267598_16933.cpp: In function 'int main()':
0_0_27267598_16933.cpp:22:13: error: 'i' was not declared in this scope
         for(i = 1; i <= m; ++i)
             ^
0_0_27267598_16933.cpp:27:17: error: 'j' was not declared in this scope
             for(j = 0; j < k; ++j)
                 ^