1 #pragma once
2 #include <stddef.h>
3 
4 #if defined(__cplusplus)
5 extern  "C"  {
6 #endif
7 
8 double fabs(double x);
9 // float fabsf(float x);
10 long double fabsl(long double x);
11 
12 double round(double x);
13 float roundf(float x);
14 long double roundl(long double x);
15 
16 int64_t pow(int64_t x, int y);
17 
18 #if defined(__cplusplus)
19 }  /* extern "C" */
20 #endif