day1

#include <iostream>
#include <string>
using namespace std;

void print_array(int a[], int n);

int main()
{
    int a[] = { 10,6,4,6,34,23,11,-1 };
    int n;
    n = sizeof(a) / sizeof(a[0]);
    cout << n << endl;

    print_array(a, n);

    system("pause");
    return 0;
}

//void print_array(int a[], int n)
//void print_array(int a[1], int n)
//void print_array(int a[2], int n)
//void print_array(int *a, int n)
//如果数组作为函数参数，数组形参退化为指针

void print_array(int a[], int n)
{
    //a,当做指针用，指针类型，32位，长度4个字符
    int i = 0, j = 0;
    int tmp;
    cout << "排序前：";
    for (i = 0; i < n; i++)
    {
        cout << a[i] << "  ";
    }
    cout << endl;

    for (i = 0; i < n - 1; i++)
    {
        for (j = i + 1; j < n; j++)
        {
            if (a[i] > a[j])
            {
                tmp = a[i];
                a[i] = a[j];
                a[j] = tmp;
            }
        }
    }

    cout << "排序后：";
    for (i = 0; i < n; i++)
    {
        cout << a[i] << "  ";
    }
    cout << endl;
}