typename使用在模板中区分static成员和类型

#include<iostream>
#include<string>
#include<vector>
#include<list>
using namespace std;
template <typename T>
void print1(const T &v)
{
    auto iter=v.begin();
    for(typename T::size_type i=0;i!=v.size();++i)
        cout<<*iter++<<" ";
    cout<<endl;
}
template <typename T>
void print2(const T &v)
{
    auto iter=v.begin();
    while(iter!=v.end())
        cout<<*iter++<<" ";
    cout<<endl;
}
int main()
{
    vector<int> vec={1,2,3,4,5,6,7,8,9,0};
    list<int> lst={1,2,3,4,5,6,7,8,9,0};
    print1(vec);
    print2(lst);
    return 0;
}