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  1. #include <iostream>
  2. #include <vector>
  3. #include <algorithm>
  4. using namespace std;
  5. int main() {
  6. 	vector<int> a={7,1,3,2,4,5,6};
  7. 	nth_element(a.begin(),a.begin()+3,a.end()); //求第4大數字
  8. 	cout<<a[3]<<endl; //要求的數字會被排在正確的位置，其餘數字則不保證
  9. 	for(int i=0;i<a.size();i++)
  10. 		cout<<a[i]<<' ';
  11. 	cout<<endl;
  12. 	return 0;
  13. }
Success #stdin #stdout 0s 3456KB
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Standard input is empty
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4
2 1 3 4 6 5 7
https://ideone.com/o1Aoh6
http://l...content-available-to-author-only...n.com/account/posts/302913-c-stl-nth-element-principle
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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