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 extern "C" { //如不用extern会出现连接错误，编译成了C++文件 #include  #include  #include  } 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