#include<stdio.h>   
#include<ruby.h>   
 
class TestClass  
{  
public:  
    TestClass(void){};  
    ~TestClass(void){};  
 
    void SayHello(char* msg)  
    {  
               printf("Ruby C/C++ extention Example cdlz.\n");  
               printf("Your Name is: %s\n",msg);  
    }  
};  
 
//VALUE self這個(gè)是不變的。指向自己。 第二個(gè)： VALUE name則是我們這個(gè)函數(shù)需要的參數(shù)。   
VALUE method_sayhello(VALUE self,VALUE name){  
    long length=0;  
    char* yourname = rb_str2cstr(name, &amp;length);  //rb_str2cstr，轉(zhuǎn)換到C語言的字符串
    TestClass* test=new TestClass();  
    test-&gt;SayHello(yourname);  
    delete test;  
	return rb_str_new2(yourname); //rb_str_new2，由C語言的字符串轉(zhuǎn)換為Ruby的String。
};  
 
VALUE method_cfunction(VALUE self, VALUE va, VALUE vb)
{
	int a = NUM2INT(va);
	int b = NUM2INT(vb);
 
	return INT2NUM(a+b);
}
 
VALUE hellotest = Qnil; //Qnil 即為 NULL 
/*
如果全部都是C的，則需要加上extern "C" void Init_HelloTest()
*/
void Init_HelloTest(){  
  hellotest = rb_define_module("HelloTest");  
  //定義一個(gè)ruby方法，在ruby中調(diào)用。最后一個(gè)參數(shù)為 ruby方法的參數(shù)個(gè)數(shù) 
  rb_define_method(hellotest, "sayhello", RUBY_METHOD_FUNC(method_sayhello), 1);  
  rb_define_method(hellotest, "cfunction_plus", RUBY_METHOD_FUNC(method_cfunction), 2);   
};

require 'mkmf'  
 
extension_name = "HelloTest" 
dirbase="D:/ruby/vc"
ruby_lib_base= dirbase+"/lib"
ruby_include_base= dirbase+"/include"
 
dir_config(extension_name)  
#如果是windows則取消下面注釋，注意，目錄名稱不能有空格
#dir_config(extension_name,ruby_include_base,ruby_lib_base)
 
create_makefile(extension_name)

ruby extconf.rb  
nmake  clean
nmake  
mt -manifest %1.so.manifest -outputresource:%1.so;2  
nmake install

require "HelloTest"
 
include HelloTest  
 
puts HelloTest.sayhello("aaa")
puts HelloTest.cfunction_plus(111,222)
 
puts HelloTest.methods - Object.methods