Suppose you define a function in the script:
Function main (Number) Number = Number 1 Return Numbend
In your game code, you want to call this function at some point to get its return value.
In Lua, the function is equivalent to variables, so you can get this function like this:
Lua_GETGLOBAL (L, "main"); // Function Now Stack Top
Now, we can call this function and pass it to its correct parameters:
Lua_PushNumber (L, 100); // Put the parameter stack Lua_PCALL (L, 1, 1, 0); // Call the function, there is a parameter, a return value // Return value Now stack top int result = Lua_tonumber (L, -1);
Result is the return value of the function
The complete test code is as follows:
#include "lua.h" #include "lauxlib.h" #include "lualib.h"
INT Main (int Argc, char * argv []) {Lua_State * L = Lua_Open (); LuaOpen_Base (L);
Const char * buf = "function main (number) Number = Number 1 Return Number End
Lua_Dostring (BUF);
Lua_GETGLOBAL (LUA_PUSHNUMBER (LUA_PUSHNUMBER (LUA_PUSHNUMBER (LUA_PCALL (L, 1, 1, 0);
Int results = Lua_tonumber (L, -1);
Assert (result == 101);
Lua_Close (L);
Return 0;}
