這是你的代碼改過的代碼，把set函數(shù)和get函數(shù)改一下就行了，get?里應(yīng)該是return
不過你書寫的格式有點(diǎn)亂啊，最好寫出層次感

#include <iostream>
#include <string>
using namespace std;
/**
?* 定義類：Student
?* 數(shù)據(jù)成員：m_strName
?* 無參構(gòu)造函數(shù)：Student()
?* 有參構(gòu)造函數(shù)：Student(string _name)
?* 拷貝構(gòu)造函數(shù)：Student(const Student& stu)
?* 析構(gòu)函數(shù)：~Student()
?* 數(shù)據(jù)成員函數(shù)：setName(string _name)、getName()
?*/
?class Student{
?public:
??? Student(){
??????? m_Name="";
?}
??? Student(string name){
???????? m_Name=name;
??? }
Student(const Student&stu){};
??? ~Student(){};
??? void set(string name){
???????? m_Name=name;
??? }
??? string get(){
??????? return m_Name;
??? }
?private:
? string m_Name;
?};

int main(void)
{
??? // 通過new方式實(shí)例化對象*stu
??? Student *stu = new Student;
??? // 更改對象的數(shù)據(jù)成員為“慕課網(wǎng)”
??? stu->set("慕課網(wǎng)");
??? // 打印對象的數(shù)據(jù)成員
??? cout<<stu->get()<<endl;
??? delete stu;
??? stu=NULL;
??? return 0;
}

string get(){
??????? string m_Name;
??? }

改為：string get(){
? ? ? ? return m_Name;
??? }

get()函數(shù)里面是需要返回私有成員的，應(yīng)該用return來返回私有成員m_Name

?void set(string name){
??????? string m_Name=name;
??? }?

改為：

?void set(string name){
? ? ? ? m_Name=name;
??? }??

string get(){
??????? string m_Name;
??? }

改為：string get(){
? ? ? ? return m_Name;
??? }