如何在C中使用指向指向结构的指针的指针? [英] How to work with pointer to pointer to structure in C?

问题描述

我想更改双指针下的结构成员.你知道怎么做吗?

I want to change member of structure under double pointer. Do you know how?

示例代码

typedef struct {
    int member;
} Ttype;

void changeMember(Ttype **foo) {
   //I don`t know how to do it
   //maybe
   *foo->member = 1;
}

推荐答案

尝试

(*foo)->member = 1;

您需要先明确使用 *.否则就是试图取消引用成员.

You need to explicitly use the * first. Otherwise it's an attempt to dereference member.

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