Question

C++高手来~！！急求答案！~

C++程序设计
输入学生姓名学号成绩
输出学生姓名学号及对应成绩 不及格人数 平均成绩

Answer 1

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

class student
{
static int n;//学生人数
static float sum;//总成绩
static int jige;//及格人数
static int bujige;//不及格人数

char name[32];
char num[32];
int score;
public:
student(){};
~student();
void getinfo();
void show();
static void show_info();
};

int student::n = 0;
float student::sum = 0;
int student::jige = 0;
int student::bujige = 0;

student::~student()
{
n--;
sum-=score;
if (score<60)
bujige--;
else
jige--;
}
void student::getinfo()
{
cout<<"请输入姓名:";
cin>>name;
cout<<"请输入学号:";
cin>>num;
cout<<"请输入成绩:";
cin>>score;

sum+=score;
n++;
if (score<60)
bujige++;
else
jige++;
}

void student::show()
{
cout<<"姓名:\t"<<name<<"\t学号:\t"<<num<<"\t成绩:\t"<<score<<endl;
}
void student::show_info()
{
cout<<"共有学生"<<n<<"人"<<endl;
cout<<"及格人数"<<jige<<"个"<<endl;
cout<<"不及格人数"<<bujige<<"个"<<endl;
if (n!=0)
cout<<"平均成绩是"<<sum/n<<endl;
}

void main()
{
student* obj;
int n;

cout<<"请输入学生总数:";
cin>>n;
if (n<=0)
{
cout<<"错误的学生人数"<<endl;
return;
}

obj = new student[n];
for (int i=0;i<n;i++)
{
cout<<"请输入第"<<i+1<<"个学生的信息"<<endl;
obj[i].getinfo();
}

while(i--)
obj[i].show();
student::show_info();
delete[] obj;
}

Answer 2

恩~8错~

Answer 3

恩！~~~确实！！！！