View Compilation Error

0_0_3896641_27271.cpp:4: error: `atan' was not declared in this scope
0_0_3896641_27271.cpp: In function `bool deal(double)':
0_0_3896641_27271.cpp:13: error: `floor' undeclared (first use this function)
0_0_3896641_27271.cpp:13: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_3896641_27271.cpp: In function `int main()':
0_0_3896641_27271.cpp:42: error: `pow' undeclared (first use this function)