如何遍历 C++ 中的对象列表? [英] How to iterate through a list of objects in C++?

问题描述

我对 C++ 非常陌生，正在努力弄清楚我应该如何遍历对象列表并访问它们的成员.

I'm very new to C++ and struggling to figure out how I should iterate through a list of objects and access their members.

我一直在尝试这个，其中 data 是一个 std::list 和 Student 一个类.

I've been trying this where data is a std::list and Student a class.

std::list<Student>::iterator<Student> it;
for (it = data.begin(); it != data.end(); ++it) {
    std::cout<<(*it)->name;
}

并收到以下错误:

error: base operand of ‘->’ has non-pointer type ‘Student’

推荐答案

离你很近了.

std::list<Student>::iterator it;
for (it = data.begin(); it != data.end(); ++it){
    std::cout << it->name;
}

请注意，您可以在 for 循环中定义 it:

Note that you can define it inside the for loop:

for (std::list<Student>::iterator it = data.begin(); it != data.end(); ++it){
    std::cout << it->name;
}

如果您使用的是 C++11，那么您可以使用基于范围的 for 循环:

And if you are using C++11 then you can use a range-based for loop instead:

for (auto const& i : data) {
    std::cout << i.name;
}

这里 auto 自动推导出正确的类型.你可以写 Student const&我代替.

Here auto automatically deduces the correct type. You could have written Student const& i instead.

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