这个程序如何输出的数字很乱啊貌似输入有有关问题，求指教

这个程序怎么输出的数字很乱啊，貌似输入有问题，求指教
#include<iostream>

using namespace std;

class student
{  
private:
char name[20];
int ID;
int age;
public:
student(char name[20],int ID,int age);
void display(){cout << "here is the student's information"<<endl
<< "name:" << name[20]<<endl
<< "ID:" << ID<<endl
<< "age" << age <<endl;}
};

student::student(char name[],int ID,int age){
cin >> *name >>ID >> age;
}

int main()
{ 
char name[20];
int ID = 0;
int age = 0;
memset(name,0,sizeof(name));
cout <<"Input student's information:" << endl;
student stu(name,ID,age);
stu.display();
return 0;
}

[解决办法]
<< name[20]
改成 << name

cin >> *name >>ID >> age;
改成 >> name

memset(name,0,sizeof(name));
没事不要用，尽量用constructor初始化class的资料
这东西只对POD管用
[解决办法]
说明见注释。

C/C++ code

#include<iostream>using namespace std;class student{   private:    char name[20];    int ID;    int age;public:    student();    void display(){        cout << "here is the student's information"<<endl        << "name:" << name<<endl   //直接指针来输出字符串        << "ID:" << ID<<endl        << "age:" << age <<endl;}};//student::student(char name[],int ID,int age){//    cin >> *name >>ID >> age;                       //形式化参数会覆盖类的成员变量，是类的成员变量得不到赋值//}student::student(){                //既然是从标准输入中获得对象的初始化数据，那么就需要从外部输入    cin >> name >>ID >> age;     //直接指针来接受字符串}int main(){      //char name[20];    //int ID = 0;    //int age = 0;    //memset(name,0,sizeof(name));    cout <<"Input student's information:" << endl;    student stu;    stu.display();    return 0;}