插入排序

插入排序

C++代码:

template <typename T>
void SortUtil<T>::insertionSort(vector<T>& data)
{
    int j = 0;
    for (int i = 1; i < data.size(); i++)
    {
        T key = data[i];

        // insert data[i] into the sorted sequence data[0..i-1]
        j = i;
        while (j > 0 && data[j - 1] > key)
        {
            data[j] = data[j - 1];
            j--;
        }

        data[j] = key;
    }
}

测试代码(C++):

void display(vector<int> data)
{
    for (auto& elem : data)
    {
        cout << elem << endl;
    }
}

int main(int argc, char* argv[])
{
    vector<int> data1 { 9, 5, 18, 21, 32, 93, 2 };
    cout << "before sort:" << endl;
    display(data1);
    SortUtil<int>::insertionSort(data1);
    cout << "after sort:" << endl;
    display(data1);
}
        

运行结果:
before sort:
9
5
18
21
32
93
2
after sort:
2
5
9
18
21
32
93