C++（day2）

Encapsulates a structure that contains a private array to store students' grades and a private variable to record the number of students.

Provide a public member function, void setNum(int num) is used to set the number of students

Provide a public member function: void input(), used to input the scores of all students

Provide a public member function: void sort(), which is used to sort the stored student scores in descending order.

Provide a public member function: void show(), used to display the scores of all students

In the main program, complete the call of relevant functions

#include <iostream>

using namespace std;


struct Stu
{
private:
    int *p = new int[128];
private:
    int num;
public:
    void setNum(int var)//设置学生人数
    {
        num = var;
    }
public:
    void intput()//插入函数
    {
        for(int i=0;i<num;i++)
        {
            cin>>p[i];
        }
    }
public:
    void show()//输出函数
    {
        for(int i=0;i<num;i++)
        {
            cout<<p[i]<<" ";
        }
    }
public:
    void sort()//排序函数（降序）
    {
        int temp;
        for(int i=1;i<num;i++)
        {
            for(int j=0;j<num-i;j++)
            {
                if(p[j]<p[j+1])
                {
                    temp = p[j+1];
                    p[j+1] = p[j];
                    p[j]=temp;
                }
            }
        }
    }

};

int main()
{
    Stu s;
    int num;
    cout<<"请输入学生个数:";
    cin>>num;
    s.setNum(num);
    s.intput();
    s.sort();
    s.show();

    return 0;
}