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  1. #include <iostream>
  2. #include <bits/stdc++.h>
  3.  
  4. using namespace std;
  5. void sw(int x, int y, vector<vector<int>> &v) {
  6.     for (auto it: v)
  7.         swap(it[x], it[y]);
  8. }
  9.  
  10.  
  11. int main() {
  12.     vector<vector<int>> v(3,vector<int> (3));
  13.     v[0] = {1, 2, 3};
  14.     v[1] = {4, 5, 6};
  15.     v[2] = {7, 8, 9};
  16.     sw(0, 2, v);
  17.     for (auto it: v)
  18.         cout << it[0] << " " << it[1] << " " << it[2] << "\n";
  19.  
  20. }
Success #stdin #stdout 0s 5312KB
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Standard input is empty
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1 2 3
4 5 6
7 8 9
https://ideone.com/LlDrDc
language:
C++14 (gcc 8.3)
created:
14 hours ago
visibility:
public

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