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29 lines
667 B
C
29 lines
667 B
C
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// 快速排序
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void QuickSort(vector<int>& v, int low, int high) {
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if (low >= high) // 结束标志
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return;
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int first = low; // 低位下标
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int last = high; // 高位下标
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float key = v[first]; // 设第一个为基准
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while (first < last)
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{
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// 将比第一个小的移到前面
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while (first < last && v[last] >= key)
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last--;
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if (first < last)
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v[first++] = v[last];
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// 将比第一个大的移到后面
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while (first < last && v[first] <= key)
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first++;
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if (first < last)
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v[last--] = v[first];
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}
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// 基准置位
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v[first] = key;
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// 前半递归
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QuickSort(v, low, first - 1);
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// 后半递归
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QuickSort(v, first + 1, high);
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}
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