C type casts and addition precedence

问题

What's the precedence in the next expression?

item = (char*)heap + offset;

Is it (char*)(heap + offset) or ((char*)heap) + offset?

回答1:

Cast trumps binary addition according to the precedence table.

回答2:

It's ((char *)heap) + offset. Casts have much higher precedence than addition.

回答3:

((char*)heap) + offset

回答4:

The cast is done first, since it has a much higher precedence. You can look that up in the C precedence table!

来源：https://stackoverflow.com/questions/3354446/c-type-casts-and-addition-precedence