1 #pragma once
2 #include "stddef.h"
3 
4 double fabs(double x);
5 float fabsf(float x);
6 long double fabsl(long double x);
7 
8 double round(double x);
9 float roundf(float x);
10 long double roundl(long double x);
11 
12 int64_t pow(int64_t x, int y);