选择排序(C/C++)

 

 

使用指针交换数据

void swap(int* num1, int* num2)
{
    int test;
    test = *num1;
    *num1 = *num2;
    *num2 = test;
}

非指针交换并排序（低到高）

void lowtoheight(int height[],int len)
{
    int test = 0;
    for (int i = 0; i < len; i++)
    {
        for (int j = i + 1; j < len; j++)
        {
            if (height[i] > height[j])
            {
                //交换身高
                test = height[i];
                height[i] = height[j];
                height[j] = test;
            }
        }
    }
}

指针交换（高到低）

void heighttolow(int low[], int len)
{
    int test = 0;
    for (int i = 0; i < len; i++)
    {
        for (int j = i + 1; j < len; j++)
        {
            if (low[i] < low[j])
            {
                //交换身高
                /*test = low[i];
                low[i] = low[j];
                low[j] = test;*/
                swap(&low[i], &low[j]);
            }
        }
    }
}

int main(void)
{
    int height[] = { 163, 161, 158, 165, 171, 170, 163, 159, 162 };

    int len = sizeof(height) / sizeof(height[0]);//长度

    lowtoheight(height, len);
    for (int i = 0; i < len; i++)
    {
        cout << height[i] << endl;
    }
    cout << "---------------------------------------" << endl;
    heighttolow(height, len);
    
    for (int i = 0; i < len; i++)
    {
        cout << height[i] << endl;
    }
    
    cin.get();
    return 0;
}

 交换后：

158 159 161 162 163 163 165 170 171
---------------------------------------
171 170 165 163 163 162 161 159 158