Lua初学者实例程序

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lua文件内容

--定义窗口大小
width = 200;
heigth = 100;

代码内容

#include <lua.hpp>

#include <iostream>  
#include <string.h>  
using namespace std;


void main()
{
//1.创建Lua状态  
lua_State *L = luaL_newstate();
if (L == NULL)
{
return;
}


//2.加载Lua文件  
int bRet = luaL_loadfile(L, "D:\\Code\\lua-5.3.4\\lib\\hello.lua");
if (bRet)
{
cout << "load file error" << endl;
cout << lua_tostring(L, -1) << endl;
return;
}


//3.运行Lua文件  
bRet = lua_pcall(L, 0, 0, 0);
if (bRet)
{
cout << "pcall error" << endl;
return;
}


//4.读取变量  
lua_getglobal(L, "width");
lua_getglobal(L, "heigth");


if (lua_isnumber(L, -2))        //取值输出  
{
double fValue = lua_tonumber(L, -2);
cout << "width is " << fValue << endl;
}
if (lua_isnumber(L, -1))        //取值输出  
{
double fValue = lua_tonumber(L, -1);
cout << "heigth is " << fValue << endl;
}


//7.关闭state  
lua_close(L);
return;






}