欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  IT编程

Lua编程示例(六): C语言调用Lua函数

程序员文章站 2022-06-17 09:31:06
c++端: #include "stdafx.h" lua_state *l; void load_lua(lua_state **l,char *fil...

c++端:

#include "stdafx.h"

lua_state *l;
void load_lua(lua_state **l,char *filename){
 *l=lual_newstate();
 lual_openlibs(*l);
 if(lual_loadfile(*l,filename) || lua_pcall(*l,0,0,0)){
 lual_error(*l,"load file error! %s",lua_tostring(*l,-1));
 }
}
int _tmain(int argc, _tchar* argv[])
{
 load_lua(&l,"raw.lua"); //此处若直接传入l会出错
 lua_getglobal(l,"gettable");
 if(lua_pcall(l,0,1,0) !=0){
 lual_error(l,"pcall wrong %s",lua_tostring(l,-1));
 }
 lual_checktype(l,1,lua_ttable);
 int n=lua_objlen(l,1);
 printf("n = %d\n",n);
 lua_pushstring(l,"ee");
 lua_rawseti(l,1,5); //t[n]=v,n为第三个参数,v是栈顶元素
 n=lua_objlen(l,1);
 printf("n = %d\n",n);
 int i;
 for(i=1;i<=n;i++){
 lua_rawgeti(l,1,i);
 printf("%s\n",lua_tostring(l,-1));
 }
 return 0;
}

lua脚本:

 

function gettable() 
  tb={ "aa","bb","cc","dd"} 
  return tb 
end 

运行输出的结果为:

n = 4 
n = 5 
aa 
bb 
cc 
dd 
ee