[C++] advance

1. advance

• iterator 헤더에 정의
• iterator에 n개의 요소가 주어질 때 특정 index를 찾음

#include <iostream>
#include <iterator>
#include <vector>
 
int main() 
{
  std::vector<int> v{ 3, 1, 4 };

  auto vi = v.begin();
  std::advance(vi, 2);
  std::cout << *vi << ' '; // 4

  vi = v.end();
  std::advance(vi, -2);
  std::cout << *vi << '\n'; // 1
}

참고

cppreference_advance

This is personal diary for study documents.
Please comment if I'm wrong or missing something else 😄. 

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