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GeezerVison is showing github.com — cpp-algorithms/sorting/QuickSort.cpp at master · atwill007/cpp-algorithms

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QuickSort.cpp

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#include <iostream>
#include <vector>
#include "./lib/DoubleVector.h"
using namespace std;
/**
* 快速排序
*
* 整个排序过程只需要三步:
*  (1)在数据集之中,选择一个元素作为"基准"(pivot)。
*  (2)所有小于"基准"的元素,都移到"基准"的左边;所有大于"基准"的元素,都移到"基准"的右边。
*  (3)对"基准"左边和右边的两个子集,不断重复第一步和第二步,直到所有子集只剩下一个元素为止
* 参考链接: https://www.ruanyifeng.com/blog/2011/04/quicksort_in_javascript.html
*/
int main()
{
vector<double> vList = cinDoubleVector();
vector<double> quickSort(vector<double>);
vector<double> sortV = quickSort(vList);
coutDoubleVector(sortV);
return 0;
}
vector<double> quickSort(vector<double> vList)
{
if (vList.size() <= 1)
return vList;
double pivot = vList[0]; // 取第一个元素作为参考
vector<double> leftV;
vector<double> rightV;
for (int i = 1; i < vList.size(); i++)
{
cout << "for " << i << endl;
if (vList[i] < pivot)
// cout << "qs: " << leftV[leftV.size()] << endl;
// leftV[leftV.size()] = vList[i];
leftV.insert(leftV.end(), vList[i]);
else
rightV.insert(rightV.end(), vList[i]);
}
vector<double> newV;
leftV = quickSort(leftV);
rightV = quickSort(rightV);
newV.insert(newV.begin(), leftV.begin(), leftV.end());
newV.insert(newV.end(), pivot);
newV.insert(newV.end(), rightV.begin(), rightV.end());
return newV;
}
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