fork download 
  1. using namespace std;
  2. #include <iostream>
  3. #include <vector>
  4.  
  5. // combine two sorted lists A and B into R
  6. // displays comparison every time it is done
  7. void combine(vector<int> A, vector<int> B, vector<int>& R)
  8. {
  9.     int ia = 0;
  10.     int ib = 0;
  11.     int sA = A.size();
  12.     int sB = B.size();
  13.  
  14.     while ((ia < sA) && (ib < sB)) {
  15.         if (A[ia] < B[ib]) {
  16.             R.push_back(A[ia]);
  17.             ia++;
  18.         }
  19.         else {
  20.             R.push_back(B[ib]);
  21.             ib++;
  22.         }
  23.     }
  24.     while(ia < sA)
  25.     {
  26.     	R.push_back(A[ia++]);
  27.     }
  28.     while(ib < sB)
  29.     {
  30.     	R.push_back(B[ib++]);
  31.     }
  32.     cout << "comparison" << endl;
  33.     // be careful -- R comes in as an empty vector
  34. }
  35.  
  36. int main()
  37. {
  38.     vector<int> L1;
  39.     vector<int> L2;
  40.     vector<int> L3;
  41.     int N;  // how many elements in each of L1 and L2
  42.     int e;  // for each element
  43.  
  44.     cout << "How many elements in each list?" << endl;
  45.     cin >> N;
  46.  
  47.     cout << "List1" << endl;
  48.     for (int i = 1; i <= N; i++)
  49.     {
  50.         cout << "element :"; cin >> e; L1.push_back(e);
  51.     }
  52.  
  53.     cout << "List2" << endl;
  54.     for (int i = 1; i <= N; i++)
  55.     {
  56.         cout << "element :"; cin >> e; L2.push_back(e);
  57.     }
  58.  
  59.     combine(L1, L2, L3);
  60.  
  61.     cout << "The result is: ";
  62.     for (int i = 0; i < N * 2; i++)
  63.     {
  64.         cout << L3[i] << " | ";
  65.     } cout << endl;
  66.  
  67. }// end of main
Success #stdin #stdout 0s 4512KB
comments (?)
stdin 
3 1 3 5 2 4 6
stdout 
How many elements in each list?
List1
element :element :element :List2
element :element :element :comparison
The result is: 1 | 2 | 3 | 4 | 5 | 6 |
https://ideone.com/3UNob2
https://stackoverflow.com/questions/58140452/adding-elements-to-a-vector/
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
secret

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!