View Compilation Error

0_0_11645690_27982.cpp: In function `int main()':
0_0_11645690_27982.cpp:12: error: `pow' undeclared (first use this function)
0_0_11645690_27982.cpp:12: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_11645690_27982.cpp:22: error: `getch' undeclared (first use this function)