大一第二学期第5周【程序阅读（4）】

#include <iostream>#include <string>using namespace std;class Student{public:    Student() {}    Student( const string& nm, int sc = 0 ): name(nm), score(sc){}    //（1）下面的const干神马？_____________    void set_student( const string& nm, int sc = 0 )    {        name = nm;        score = sc;}    //（2）下面的const分别干神马？___________    const string& get_name() const    {        return name;}    int get_score() const    {        return score;    }private:    string name;    int score;};//（3）下面的const干神马？_____________void output_student(const Student& student ){    cout << student.get_name() << "\t";    cout << student.get_score() << endl;}int main(){    Student stu( "Wang", 85 );    output_student( stu );    return 0;}