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  1. //
  2. //  main.cpp
  3. //  Pair
  4. //
  5. //  Created by Himanshu on 11/04/22.
  6. //
  7.  
  8. #include <iostream>
  9. #include <utility>
  10. #include <vector>
  11. #include <string>
  12. using namespace std;
  13.  
  14. int main () {
  15.  
  16.     //Initializations
  17.  
  18.     //using make_pair
  19.     pair<int, int> pairRank = make_pair(1, 98);
  20.  
  21.     //using value init
  22.     pair<int, string> pairNameFirst (1, "Anon");
  23.  
  24.     //using copy constructor
  25.     pair<int, string> pairTemp(pairNameFirst);
  26.  
  27.  
  28.     cout<<"pairRank values:"<<endl;
  29.     cout<<pairRank.first<<", "<<pairRank.second<<endl;
  30.  
  31.     //accessing pair elements using method get<>
  32.     cout<<"pairNameFirst values:"<<endl;
  33.     cout<<get<0>(pairNameFirst)<<", "<<get<1>(pairNameFirst)<<endl<<endl;
  34.  
  35.     vector<pair<int, int>> pairRankVector;
  36.     vector<pair<int, string>> pairNameVector;
  37.  
  38.     vector<pair<int, int>>::iterator rankItr;
  39.     vector<pair<int, string>>::iterator nameItr;
  40.  
  41.     pairRankVector.push_back(pairRank);
  42.     pairNameVector.push_back(pairNameFirst);
  43.  
  44.     vector<int> rankMarks = {95, 90, 87, 83, 75};
  45.     vector<string> rankNames = {"Bruw", "Cync", "Droke", "Elph", "Frel"};
  46.  
  47.  
  48.     int n = (int) rankMarks.size();
  49.  
  50.     for (int i=0; i<n; i++) {
  51.         pairRankVector.push_back(make_pair(i+2, rankMarks[i]));
  52.         pairNameVector.push_back(make_pair(i+2, rankNames[i]));
  53.     }
  54.  
  55.     cout<<"Size of pairRankVector: "<<pairRankVector.size()<<endl<<endl;
  56.  
  57.     //accessing vector elements using iterator,
  58.     //accessing pair elements using -> operator
  59.     //accessing vector element using (*iterator)
  60.     for (rankItr = pairRankVector.begin(), nameItr = pairNameVector.begin();
  61.          rankItr != pairRankVector.end(); rankItr++, nameItr++) {
  62.  
  63.         cout<<rankItr->first<<" "<<nameItr->second<<" "<<(*rankItr).second<<endl;
  64.     }
  65.  
  66.   return 0;
  67. }
  68.  
Success #stdin #stdout 0.01s 5516KB
comments (?)
stdin 
Standard input is empty
stdout 
pairRank values:
1, 98
pairNameFirst values:
1, Anon

Size of pairRankVector: 6

1 Anon 98
2 Bruw 95
3 Cync 90
4 Droke 87
5 Elph 83
6 Frel 75
https://ideone.com/rU7xnv
language:
C++14 (gcc 8.3)
created:
2 years ago
visibility:
secret

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