fork download
copy 
  1. #include <vector>
  2. #include <iostream>
  3. using namespace std;
  4.  
  5. void func(vector<int>& vec)
  6. {
  7.     // modify the vector
  8.     vec.push_back(2);
  9.     vec.push_back(3);
  10. }
  11.  
  12. int main()
  13. {
  14.     vector<int> a;  // our vector
  15.     a.push_back(1);  // add 1 element to it
  16.  
  17.     func(a);  // pass it to our function (by reference) to add 2 more
  18.  
  19.     // how many items?
  20.     cout << a.size();  // will output 3
  21. }
Success #stdin #stdout 0s 3428KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
3
https://ideone.com/K9bEWK
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!