面向对象程序设计-实验5

• 实验内容、实验步骤及实验结果

题目1

例如：

7-1 平均成绩

代码清单：

#include<iostream>

#include<string>

using namespace std;

class student

{

    public:

    string str;

    int m_a;

    int m_b;

    int m_c;

    double avg;

    void set(string str,int a,int b,int c)

    {

        this->str=str;

        this->m_a=a;

        this->m_b=b;

        this->m_c=c;

        this->avg=(a+b+c)*1.0/3;

    }

};

int main()

{

    int i=0;

    string str;

    int a,b,c;

    int n;

    cin>>n;

    student *p=new student[n];

    for(i=0;i<n;i++)

    {

        cin>>str>>a>>b>>c;

        p[i].set(str,a,b,c);

    }

    for(i=n-1;i>=0;i--)

    {

        if(p[i].avg>=60)

        {

            cout<<p[i].str<<" "<<p[i].m_a<<" "<<p[i].m_b<<" "<<p[i].m_c;

            printf(" %.2lf\n",p[i].avg);

        }

    }

    return 0;

}

运行结果截图

题目2（给出题目描述）

7-2 队列操作

代码清单：

#include<iostream>

using namespace std;

class MyQueue{

    private:

int p[10001];

int l=0;

int r=0;

    public:

       void push(int x);

    int pop()

    {

            return p[l++];

    }

    int size()

    {

            return r-l;

    }

};

void MyQueue::push(int x)

{

     p[r++]=x;

}

int main()

{

    int n,i;

    MyQueue my;

    cin>>n;

    for(i=0;i<n;i++)

    {

        int op;

        cin>>op;

        if(op==1)

        {

            int x;

            cin>>x;

            my.push(x);

        }

        else if(op==2)

        {

            if(my.size()==0)

                cout<<"Invalid"<<endl;

                else

                    cout<<my.pop()<<endl;

        }else if(op==3)

        {

            cout<<my.size()<<endl;

        }

    }

    return 0;

}

运行结果截图

题目3（给出题目描述）

7-3 鸿鸿哥的苹果树

代码清单：

#include<iostream>

using namespace std;

int main()

{

    int a[10];

    for(int i=0;i<10;i++)

    {

        cin>>a[i];

    }

    int x=0;

    cin>>x;

    int count=0;

    for(int i=0;i<10;i++)

    {

        if((x+30)>=a[i])

            count++;

    }

    cout<<count;

    return 0;

}

运行结果截图