小编Geo*_*ang的帖子

#include <iostream>
#include <string>
#include <vector>

using namespace std;

int main()
{
  vector<int> v = {1, 2, 3, 4, 5, 6, 7};
  int i = -4;

  cout << i << endl;
  cout << v.size() << endl;
  cout << i % v.size() << endl;
  cout << -4 % 7 << endl;
}

The above code prints:

-4
7
5
-4

Can someone please explain why i % v.size() prints 5 instead of -4? I'm guessing it has something to do …