cocos2d代码转换为C++的

Cocos2d-x
#1

_terrain = initWithWorld:_world] autorelease];
变成C++的代码是什么？
感谢大神

#2

_terrain = new Terrain;
_terrain->initWithWorld(_world);
_terrain->autorelease; ?

#3

autorelease就不用delete了

#4

delete还怎么用啊

#5

_terrain->autorelease; --------> delete(_terrain);吧

#6

_terrain = new Terrain;
_terrain->initWithWorld(_world);
_terrain->autorelease; ?

#7

delete还怎么用啊

#8

_terrain->autorelease; --------> delete(_terrain);吧