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  1. #include <iostream>
  2. #include <vector>
  3. #include <utility>
  4. #include <algorithm>
  5. using namespace std;
  6.  
  7. int main()
  8. {
  9.     pair<int, double> p;
  10.     vector<pair<int, double> > vp;
  11.  
  12.     p.first = 2;
  13.     p.second = 2.4;
  14.     vp.push_back(p);
  15.  
  16.     p.first = 9;
  17.     p.second = 3.0;
  18.     vp.push_back(p);
  19.  
  20.     p.first = 10;
  21.     p.second = 3.1;
  22.     vp.push_back(p);
  23.  
  24.     p.first = 1;
  25.     p.second = 2.4;
  26.     vp.push_back(p);
  27.  
  28.     p.first = 5;
  29.     p.second = 3.1;
  30.     vp.push_back(p);
  31.  
  32. 	cout << "before sort:" << endl;
  33.     for(auto &p : vp) {
  34. 		cout << p.first << ", " << p.second << endl;
  35.     }
  36.  
  37. 	sort(vp.begin(), vp.end(),
  38. 	    [](const pair<int, double> &p1, const pair<int, double> &p2){
  39.     	    if (p1.second > p2.second) return true;
  40.         	if (p1.second < p2.second) return false;
  41. 	        return p1.first < p2.first;
  42.     	}
  43. 	);
  44.  
  45. 	cout << endl;
  46. 	cout << "after sort:" << endl;
  47.  
  48. 	for(auto &p : vp) {
  49. 		cout << p.first << ", " << p.second << endl;
  50.     }
  51. }
Success #stdin #stdout 0s 5540KB
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stdin
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Standard input is empty
stdout
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before sort:
2, 2.4
9, 3
10, 3.1
1, 2.4
5, 3.1

after sort:
5, 3.1
10, 3.1
9, 3
1, 2.4
2, 2.4
https://ideone.com/VbhcGo
language:
C++ 4.3.2 (gcc-4.3.2)
created:
3 years ago
visibility:
public

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