View Compilation Error

0_0_6558209_8468.cpp: In function `int main()':
0_0_6558209_8468.cpp:13: error: `n' undeclared (first use this function)
0_0_6558209_8468.cpp:13: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_6558209_8468.cpp:13: error: `m' undeclared (first use this function)
0_0_6558209_8468.cpp:13: error: `kk' undeclared (first use this function)
0_0_6558209_8468.cpp:16: error: `i' undeclared (first use this function)
0_0_6558209_8468.cpp:17: error: `j' undeclared (first use this function)
0_0_6558209_8468.cpp:23: error: `k' undeclared (first use this function)