／／main()函數

**#include <iostream> #include <fstream> #include <cstring> #include <strstream> #include "header1.h.h" #include "hearder2.h.h" using namespace std; int main() {ns1::Student stud1(101,"Wang",18);stud1.get_data();cout<<ns1::fun(5,3)<<endl;ns2::Student stud2(102,"Li",'f');stud2.get_data();cout<<ns2::fun(5,3)<<endl; }**

／／header1.h文件

**// // Created by andrew on 15/03/17. //#ifndef UNTITLED9_HEADER1_H_H #define UNTITLED9_HEADER1_H_H #include <string> #include <cmath> #include <iostream> using namespace std; namespace ns1 {class Student{public:Student(int n,string nam,int a){num=n;name=nam;age=a;}void get_data();private:int num;string name;int age;};void Student::get_data(){cout<<num<<" "<<name<<" "<<age<<endl;}double fun(double a,double b){return sqrt(a+b);}}#endif //UNTITLED9_HEADER1_H_H **

//hearder2.h頭文件

**// // Created by andrew on 15/03/17. //#ifndef UNTITLED9_HEARDER2_H_H #define UNTITLED9_HEARDER2_H_H #include <string> #include <cmath> #include <iostream> using namespace std; namespace ns2 {class Student {public:Student(int n, string nam, char s) {num = n;name = nam;sex = s;}void get_data();private:int num;string name;char sex;};void Student::get_data() {cout << num << " " << name << " " << sex << endl;}double fun(double a, double b){return sqrt(a-b);} }#endif //UNTITLED9_HEARDER2_H_H **

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