访问矢量的内容

Question

我需要访问向量的内容.向量包含一个结构,我需要循环遍历向量并访问结构成员.

我怎么能用for循环和向量迭代器呢？

Answer 1

使用迭代器或[]:

// assuming vector will store this type:
struct Stored {
    int Member;
};

//and will be declared like this:
std::vector<Stored> vec;

// here's how the traversal loop looks like with iterators
for( vector<Stored >::iterator it = vec.begin(); it != vec.end(); it++ ) {
   it->Member;
}

// here's how it looks with []
for( std::vector<Stored>::size_type index = 0; index < vec.size(); index++ ) {
   vec[index].Member;
}