View Compilation Error

0_0_9720138_26925.cpp: In function `int main()':
0_0_9720138_26925.cpp:4: error: `m' undeclared (first use this function)
0_0_9720138_26925.cpp:4: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_9720138_26925.cpp:5: error: `i' undeclared (first use this function)
0_0_9720138_26925.cpp:5: error: `k' undeclared (first use this function)