Question

如何通过迭代器来或得对应元素的下标

Answer 1

auto iter = std::find_if(vecTitle.begin(), vecTitle.end(), [&](const _tstring& title)
{
return iCells == title;
});
// iCells是外部引入
auto i = std::distance(vecTitle.begin(), iter); // 这个就是根据迭代器获取下标

iter为数组vecTitle的迭代器

Answer 2

#include <iostream>
#include <list>
using namespace std;

int main () {
list<int> mylist;
for (int i=0; i<10; i++) mylist.push_back (i*10);

list<int>::iterator first = mylist.begin();
list<int>::iterator last = mylist.end();
list<int>::iterator it = first;
for(;it != last;++it)
cout<<"第"<<distance(first,it)<<"个元素的值为："<<*it<<endl;
return 0;
}