Question

#include<iostream> using namespace std; class Student { private: string name; int age; double high;

#include<iostream>
using namespace std;
class Student
{
private:
string name;
int age;
double high;
char sex;
public:
Student(){};
Student(string n,int a,double h,char s);
void display();
void changage();
void set_data();
};
Student::Student(string n,int a,double h,char s)
{
name=n;age=a;high=h;sex=s;
}
void Student::display()
{
cout<<"姓名："<<name<<'\t'<<"年龄："<<age<<'\t'<<"身高："<<high<<'\t';
switch(sex)
{
case 'w':cout<<"男";break;
default:cout<<"女";break;
}
}
void Student::changage(string n,int a,double h,char s)
{
name=n;age=a;high=h;sex=s;
}
void Student::set_data()
{
cout<<"请依次输入姓名，年龄，身高，性别："
cin>>name>>age>>high>>sex>>endl;
}
void main()
{
Student a1,a2;
a1("zhanghua",23,1.56,'w');
a1.display();
a2.set_data();
a2.display();
}
请高手指点迷津！重点是输出函数怎么错了！！！

Answer 1

Student a1,a2;
a1("zhanghua",23,1.56,'w');首先这里会编译不过，构造函数是在声明的时候调用的，
Student a1("zhanghua",23,1.56,'w');应该这样

或者
Student a1,a2;

a1.changage("zhanghua",23,1.56,'w');
然后这里
a2.display();由于a2里面的变量都没赋值，导致值时乱码，也是有问题的

Answer 2

#include<iostream>
using namespace std;
class Student
{
private:
string name;
int age;
double high;
char sex;
public:
Student(){};
Student(string n,int a,double h,char s);
void display();
void changage();//这个函数啊，怎么与下面的实现不一样啊，搞什么
void set_data();
};
Student::Student(string n,int a,double h,char s)
{
name=n;age=a;high=h;sex=s;
}
void Student::display()
{
cout<<"姓名："<<name<<'\t'<<"年龄："<<age<<'\t'<<"身高："<<high<<'\t';
switch(sex)
{
case 'w':cout<<"男";break;
default:cout<<"女";break;
}
}
void Student::changage(string n,int a,double h,char s)
{
name=n;age=a;high=h;sex=s;
}
void Student::set_data()
{
cout<<"请依次输入姓名，年龄，身高，性别："//上面的cout都有分号，这块怎么没了？
cin>>name>>age>>high>>sex>>endl;//endl是变量？不是的话你想给他传什么？
}
void main()
{
Student a1,a2;
a1("zhanghua",23,1.56,'w');//这句啊，怎么学的c++啊
a1.display();
a2.set_data();
a2.display();
}
//错误提示都不贴，看来是个新手，而且还不会提问