View Compilation Error

0_0_6633027_10520.cpp: In function `int main()':
0_0_6633027_10520.cpp:11: error: `k' undeclared (first use this function)
0_0_6633027_10520.cpp:11: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_6633027_10520.cpp:11: error: expected primary-expression before ')' token
0_0_6633027_10520.cpp:11: error: expected `;' before ')' token