第三题

//main file
#include <iostream>
using namespace std;
#include "xt8-3-h1.h"
#include "xt8-3-h2.h"
using namespace std;
using namespace student1;

int main()
{Student stud1(1001,"Wang",18,"123 Beijing Road,Shanghua");
stud1.show_data();
student2::Student stud2(1102,"Li",'f',89.5);
stud2.show_data();
return 0;
}

//header1.h，文件名为xt8-3-h1.h
#include <string>
namespace student1
{class Student
{public:
Student(int n,string nam,int a,string addr)
{num=n;name=nam;age=a;address=addr;}
void show_data();
private:
int num;
string name;
int age;
string address;
};
void Student::show_data()
{cout<<"num:"<<num<<"  name:"<<name<<"  age:"<<age
<<"  address:"<<address<<endl;
}
}

//header2.h，文件名为xt8-3-h2.h
#include <string>
namespace student2
{class Student
{public:
Student(int n,string nam,char s,float sco)
{num=n;name=nam;sex=s;score=sco;}
void show_data();
private:
int num;
string name;
char sex;
float score;
};

void Student::show_data()
{cout<<"num:"<<num<<"  name:"<<name<<" sex:"<<sex
<<"   score:"<<score<<endl; }
}

<img src="https://img-blog.csdn.net/20150624230245535?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvbW9sdXpodWk=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />