如何在c ++中迭代对象列表 [英] How to iterate through a list of objects in c++

问题描述

我对c ++很陌生并努力弄清楚我应该如何遍历对象列表并访问那些成员。

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

我一直在尝试这个其中'data'是列表，'student'是一个类。

I've been trying this where 'data' is the 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

你已经关闭了。

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

请注意，你可以定义它 里面的循环：

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，那么您可以使用范围 - 基于 for 循环代替：

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;
}

这里自动自动推断出正确的类型。你可以写学生const&我而不是。

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

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