C API、lua_next()

everyday Lua 
/*
 * $ gcc -Wall -W -I/usr/include/lua50 -o 2008103100 -llua50 2008103100.c
 */

#include <stdio.h>
#include <lua.h>

int main(void) {
  lua_State *L;

  L = lua_open();

  lua_newtable(L);

  lua_pushstring(L, "foo");
  lua_pushnumber(L, 10);
  lua_settable(L, 1);

  lua_pushstring(L, "bar");
  lua_pushnumber(L, 20);
  lua_settable(L, 1);

  lua_pushnil(L);
  while (lua_next(L, 1) != 0) {
    printf("%s(%s) - %d(%s)\n",
           lua_tostring(L, -2), lua_typename(L, lua_type(L, -2)),
           (int)lua_tonumber(L, -1), lua_typename(L, lua_type(L, -1)));
    lua_pop(L, 1);
  }

  lua_close(L);

  return 0;
}

で、

bar(string) - 20(number)
foo(string) - 10(number)