交换

#include <iostream>


using namespace std;

template <class T>

T change_value(T &value1, T &value2)
{
    T tmp = value2;
    value2 = value1;
    value1 = tmp;
}

int main(int argc, char const *argv[])
{
    int a = 1;
    int b = 2;
    float a1 = 66.66;
    float b1 = 99.99;    
    cout<<"交换前："<<a<<" "<<b<<endl;
    change_value(a,b);
    cout<<"交换后："<<a<<" "<<b<<endl;

    cout<<"交换前："<<a1<<" "<<b1<<endl;
    change_value(a1,b1);
    cout<<"交换后："<<a1<<" "<<b1<<endl;

    return 0;
}

排序：两两比较，进行交换

#include <iostream>

using namespace std;

template <class T>
T sort(T *str)
{
    int len = 0;

    while (1)
    {
        if (str[len] == 0 || str[len] == '\0')
        {
            break;
        }
        len++;
    }
    cout << len << endl;

    //两两比较，进行交换
    for (int i = 0; i < len; i++)
    {
        for (int j = 0; j < len - 1; j++)
        {
            if (str[j] > str[j + 1])
            {
                T tmp = str[j];
                str[j] = str[j + 1];
                str[j + 1] = tmp;
            }
        }
    }
}

template <class T>
void show_arry(T *arry)
{
    //求出数组的元素个数
    int len = 0;
    while (1)
    {
        if (arry[len] == 0 || arry[len] == '\0')
        {
            break;
        }
        len++;
    }

    for (int i = 0; i < len; i++)
    {
        cout << arry[i] << " ";
    }
}

int main(int argc, char const *argv[])
{
    char str[1024] = {"sadhalsflfjhjffa"};

    //排序模板
    sort(str);
    show_arry(str);
    cout << endl;

    int arry[10] = {12, 26, 40, 6, 5, 7, 9, 56};
    sort(arry);

    show_arry(arry);
    cout << endl;

    return 0;
}