Numerics
From cppreference.com
< c
The C numerics library includes common mathematical functions and types, as well as support for random number generation.
Common mathematical functions
The header math.h
provides standard C library mathematical functions such as fabs, sqrt, and sin.
Floatingpoint environment
The header fenv.h
defines flags and functions related to exceptional floatingpoint state, such as overflow and division by zero.
Pseudorandom number generation
The header stdlib.h
also includes Cstyle random number generation via srand and rand.
Complex number arithmetic
The header complex.h
povides types and functions about complex numbers.
Typegeneric math
The header tgmath.h
provides some macros for a function which names XXX:
 real function:
 float variant
XXXf
 double variant
XXX
 long double variant
XXXl
 float variant
 complex function:
 float variant
cXXXf
 double variant
cXXX
 long double variant
cXXXl
 float variant
See also
C++ documentation for Numerics library
