这个C ++语句是什么意思？ [英] What does this C++ statement mean?

问题描述

void max_idxs(vector<int> &pidxs){
   vector<fragment *> ids;
   max_ids(ids);

   for(size_t i = 0; i < ids.size(); i++){
    int weight_idx = ids[i]->weight_idx; //Get weight index
   }
}

在这个C ++代码中，是 int weight_idx = ids [i] - > weight_idx; ？

In this C++ code, what does it mean by int weight_idx = ids[i]->weight_idx;?

- > 是什么意思？

谢谢！

推荐答案

x-> y 表示（* x）.y 。换句话说，获取 x 指向的地址，并从那里的对象获取变量 y 。这里，它意味着它将从指向的片段中获取 weight_idx i] 。

x->y means (*x).y. In other words, "take the address pointed to by x, and get the variable y from the object there". Here, it means it'll get the weight_idx from the fragment pointed to by ids[i].

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