View Compilation Error

0_0_3785241_21086.cpp: In function `double fax(double)':
0_0_3785241_21086.cpp:6: error: `pow' undeclared (first use this function)
0_0_3785241_21086.cpp:6: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_3785241_21086.cpp: In function `double mini(double)':
0_0_3785241_21086.cpp:10: error: `pow' undeclared (first use this function)
0_0_3785241_21086.cpp: In function `int main()':
0_0_3785241_21086.cpp:26: error: `fabs' undeclared (first use this function)