C++begin和end运算符的返回迭代器的类型如何判断?

#include <iostream> 
#include <vector>
using namespace std;  
int main() 
{ 
 vector<int> ivec;
 const vector<int> cv;
 auto it1 = ivec.begin();
 auto it2 = cv.begin();
 cout<<typeid(it1).name()<<endl;
 cout<<typeid(it2).name()<<endl;
 system("pause");
}