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  1. #include <iostream>
  2. #include <algorithm>
  3. #include <memory>
  4.  
  5. typedef std::pair<int,int> Pair;
  6.  
  7. bool compare(const Pair& i, const Pair& j) { return i.first < j.first; }
  8.  
  9. int main() {
  10. 	const int N=5;
  11. 	Pair pairs[N] = {{1,2}, {7,8}, {13,14}, {4,5}, {10,11}};
  12.  
  13. 	std::cout << "unsorted" << std::endl;
  14. 	for(int i=0; i<N;++i) std::cout << i << ": (" << pairs[i].first << ", " << pairs[i].second << ")" << std::endl;
  15.  
  16. 	std::sort(pairs, pairs+N, compare);
  17.  
  18. 	std::cout << "sorted" << std::endl;
  19. 	for(int i=0; i<N;++i) std::cout << i << ": (" << pairs[i].first << ", " << pairs[i].second << ")" << std::endl;
  20.  
  21. 	return 0;
  22. }
Success #stdin #stdout 0s 3344KB
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stdin
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Standard input is empty
stdout
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unsorted
0: (1, 2)
1: (7, 8)
2: (13, 14)
3: (4, 5)
4: (10, 11)
sorted
0: (1, 2)
1: (4, 5)
2: (7, 8)
3: (10, 11)
4: (13, 14)
https://ideone.com/AqQlj0
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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