c++实现对输入数组进行快速排序的示例(推荐)

时间:2021-05-20

废话不多说,直接上代码

#include "stdafx.h"#include <iostream>#include <string>#include <vector>using namespace std;void quickSort(vector<int> &a, int, int);void swap(int &a, int&b);vector<string> split(string s, string seperator);int main() { string str; cout << "please input your array: " << endl; getline(cin, str); vector<string> strs = split(str, " "); cout << "The original array is " << endl; for (unsigned int i = 0; i < strs.size(); i++) { cout << strs[i] << " "; } cout << endl; vector<int> array(strs.size()); for (unsigned int i = 0; i < strs.size(); i++) { array[i] = atoi(strs[i].c_str()); } int len = array.size(); cout << "The ordered array is " << endl; quickSort(array, 0, len-1); for (int i = 0; i < len; i++) { cout << array[i] << " "; } cout << endl; system("pause"); return 0;}void quickSort(vector<int> &a, int start, int base) { if (start >= base) { return; } int i = start, j = start; int temp = a[base]; for (;j<base;j++) { if (a[j]<=temp) { swap(a[i], a[j]); i++; } } if (a[i] > a[base]) { swap(a[i], a[base]); } quickSort(a, start, i - 1); quickSort(a, i + 1, base);}void swap(int &a, int&b) { if (a == b) { } else { a = a + b; b = a - b; a = a - b; } }vector<string> split(string s, const string pattern) { string::size_type pos; vector<string> result; s += pattern; unsigned int size = s.size(); for (unsigned int i = 0; i < size; i++) { pos = s.find(pattern, i); if (pos < size) { string str = s.substr(i, pos - i); if (!str.empty()){ result.push_back(str); } i = pos + pattern.size() - 1; } } return result;}

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