View Compilation Error

347622_0_31627.cpp: In function `int main()':
347622_0_31627.cpp:11: error: `sqrt' undeclared (first use this function)
347622_0_31627.cpp:11: error: (Each undeclared identifier is reported only once for each function it appears in.)
347622_0_31627.cpp:18: error: `fabs' undeclared (first use this function)