[C++知识库]lua和c++的交互通过栈解释

栈的操作：https://www.cnblogs.com/lsgxeva/p/11158228.html

print(package.path)
package.path = package.path .. ";E:\\OGL5\\c++calllua\\luascript\\?.lua;"
print("hello")
print(package.path)

require 'person'

c = add(1,4)
print(c)
myName = "beauty girl"
helloTable = {name="xiaoming", age=12}

C++访问lua的table

	lua_State* L = luaL_newstate();
	/* 载入Lua基本库 */
	luaL_openlibs(L);
	/* 运行脚本 */
	luaL_dofile(L, "hello.lua");

	ua_getglobal(L, "helloTable"); //helloTable入栈 -1
	lua_pushstring(L, "name"); //name入栈，helloTable入栈 -2，name变为-1
	lua_pushstring(L, "age"); //age入栈 ，helloTable入栈 -3，name变为-2，age变为-1
	lua_gettable(L, -3); //取得hellotable表
	int age = lua_tointeger(L, -1); //12
	const char* sName = lua_tostring(L, -2); //xiaoming
	lua_pop(L, 1); //age被pop掉，helloTable入栈 -2，name变为-1
	const char* sName2 = lua_tostring(L, -1); //xiaoming
	lua_pushinteger(L, 23); //helloTable入栈 -3，name变为-2，23变为-1
	int age2 = lua_tointeger(L, -1); //23

	lua_pushinteger(L, 32); //helloTable入栈 -3，name变为-2，23变为-1
	int count = lua_gettop(L); //取得栈中元素个数
	lua_settop(L, 2);	//设置栈为2个元素
	int count2 = lua_gettop(L); //取得栈中元素个数

	/* 清除Lua */
	lua_close(L);
	system("pause");