C++中调用Lua配置文件和响应函数示例

// Lua1.cpp : 定义控制台应用程序的入口点。 //  #include "stdafx.h" #include<stdio.h>  extern "C" { //如不用extern会出现连接错误，编译成了C++文件 #include <lua.h> #include <lualib.h> #include <lauxlib.h> }   void load (lua_State *L,int *width,int *height){   lua_getglobal(L,"width");  //获得Lua中变量的值，将其放入栈中   lua_getglobal(L,"height");    if(!lua_isnumber(L,-2))   //栈顶为-1，然后依次减少     luaL_error(L,"`width' should be a number/n");    if(!lua_isnumber(L,-1))     luaL_error(L,"`height' should be a number/n");   *width = (int)lua_tonumber(L,-2);  //将栈顶元素转化为数字   *height = (int)lua_tonumber(L,-1); }  int add(lua_State *L,int a, int b){    int sum=0;   lua_getglobal(L,"add");  //函数也是变量，所以一个取法   lua_pushnumber(L,a);   //将变量传入   lua_pushnumber(L,b);       //第二个参数为调用函数的参数的个数，第三个为返回值的个数，第四个参数是错误处理函数，正常运行返回0   if(lua_pcall(L,2,1,0) != 0){       luaL_error(L,"the lua load error! %s",lua_tostring(L,-1));   }      //函数的返回值已经传入栈中   if(!lua_isnumber(L,-1)){      luaL_error(L,"the func run error! %s",lua_tostring(L,-1));   }    sum = (int)lua_tonumber(L,-1); //取栈顶元素将其转为数字，默认为double型    lua_pop(L,1)    //将return元素移除   return sum; }  int get_num(lua_State *L){      lua_getglobal(L,"roll_num");   if(lua_pcall(L,0,1,0) != 0){     luaL_error(L,"the lua load error! %s",lua_tostring(L,-1));   }    if(!lua_isnumber(L,-1)){     luaL_error(L,"the func run error! %s",lua_tostring(L,-1));   }    int n = (int)lua_tonumber(L,-1);   lua_pop(L,1);   return n; } int _tmain(int argc, _TCHAR* argv[]) {   lua_State *L = lua_open();   luaL_openlibs(L); //新版本库添加的方法   if(luaL_loadfile(L,"cof.lua") || lua_pcall(L,0,0,0)){     luaL_error(L,"loadfile error! %s /n",lua_tostring(L,-1));   }    int w=1,h=2;   int sum;   load(L,&w,&h);   printf("width is %d ,height is %d/n",w,h);   sum=add(L,w,h);   printf("the sum is: %d /n",sum);         bool flag = true;   char c;   while(flag){     printf("Do you want to roll the number? /n");     scanf("%c",&c);     if(c == 'y' || c=='Y'){       printf("rolling the number..../n the num is %d /n",get_num(L));     }     else flag=false;     getchar();   }    getchar();   return 0; } 

-- config test  width = 200 height = 500  function add(a,b)   return a+b end  math.randomseed(os.time()) function roll_num()   return math.random(6) end