【4.c调用lua】

目录结构

1.lua代码

name = "skynet"

function add(a, b)
    return a + b + 100
end

2.c代码

#include 
#include "../include/lua.h"
#include "../include/lualib.h"
#include "../include/lauxlib.h"

int main()
{
    lua_State *L = luaL_newstate(); // 打开lua
    luaL_openlibs(L);              // 打开标准库
    int retLoad = luaL_loadfile(L, "../script/test.lua");
    if(retLoad == 0){
        printf("load file success retLoad:%dn", retLoad);
    }
    lua_pcall(L, 0, 0, 0);// 调用lua
    //lua_getglobal(L, "name");//取lua层全局变量name并返回到栈顶
    //const char *name = lua_tostring(L, 1);
    //printf("name = %sn", name);
    //lua_pop(L, 1); //清空栈
    //调用函数
    lua_getglobal(L, "add");
    lua_pushnumber(L, 10);
    lua_pushnumber(L, 5);
    // 表示传入两个参数，返回一个值
    int j;
    for (j=1;j<5;j++){
        printf("num0:%fn",lua_tonumber(L, -j));
    }
    int sumRet = lua_pcall(L, 2, 1, 0);
    printf("sumRet:%dn",sumRet);
    int val = lua_tonumber(L, -1);
    printf("sum:%dn",val);
    int i;
    for (i=1;i<5;i++){
        printf("num:%fn",lua_tonumber(L, -i));
    }
    lua_pop(L, -1);
    lua_close(L);
    printf("Hello worldn");
    return 0;
}

3.Makefile

main:
	gcc -lm -g -o main main.c /usr/local/lib/liblua.a -ldl

clean:
	rm -rf main *.o