In Unix, 
building libfunc.a and dynamically loaded lib "libsample.dl"
   make -f Makefile

In Windows,
Building func.lib and func.dll, and dynamically loaded lib "libsample.dl"
   nmake -f Makefile_lib.win


func3(), func4(), func5() are special functions.

Execute Ch program and functions in Ch command shell interactively as shown below

> program.c
sin(3) = 0.141120
hypot(3,4) = 5.000000
func1(3) = 0.282240
func2(3,4) = 10.000000
s.i = 4
s.f = 4.000000
s.i = 8
s.f = 8.000000
n in func() = 10
ret = 20
> func1(5)
-1.9178 
> func2(3,4)
10.0000 
