[已解决]C++实验题求教！！

ttyule1 · 发表于 2020-6-21 18:54:58

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本帖最后由 ttyule1 于 2020-6-21 19:15 编辑

定义一个学生类，它包含学号（int）、姓名（string）、性别（sex）、分数（float）等数据成员，定义一个对象，重载赋值运算符“=”，使“=”能够实现int、string、float型的数据为该对象赋值；重载运算符“<<”“>>”，使之能够直接输入、输出学生类的对象。
如题，是一道实验题，关键就是重载运算符“=”这一块，没太明白是什么意思，请大家帮忙解决一下！！！

下面是除了“重载赋值运算符“=”，使“=”能够实现int、string、float型的数据为该对象赋值”的代码，请大家帮忙完善一下“重载赋值运算符“=”，使“=”能够实现int、string、float型的数据为该对象赋值”

#include <iostream>
#include <string>
using namespace std;
class Student
{
private:
int num;
string name;
char sex;
float score;
public:
Student(){}
Student(int nu,string na,char se='M',float sc=0)
{
num=nu;
name=na;
sex=se;
score = sc;
}
friend istream & operator >>(istream&,Student &);
friend ostream & operator <<(ostream&,Student &);
};
istream &operator >>(istream & is ,Student &s )
{
is>>s.num>>s.name>>s.sex>>s.score;
return is;
}
ostream &operator <<(ostream & os ,Student &s)
{
os<<"【学生信息】"<<"学号："<<s.num<<","<<"姓名："<<s.name<<","<<"性别："<<s.sex<<","<<"成绩："<<s.score<<endl;
return os;
}
int main( )
{
Student stu;
cout<<"请分别输入该学生的学号、姓名、性别和成绩（中间用空格隔开）：";
cin >> stu;
cout << stu;
system("pause");
return 0;
}

复制代码

最佳答案

月排行榜 / 总排行榜

sunrise085

2020-6-21 20:01:43

#include <iostream>
#include <string>
using namespace std;
class Student
{
private:
int num;
string name;
char sex;
float score;
public:
Student(){}
Student(int nu,string na,char se='M',float sc=0)
{
num=nu;
name=na;
sex=se;
score = sc;
}
friend istream & operator >>(istream&,Student &);
friend ostream & operator <<(ostream&,Student &);
Student & operator =(const Student &);
};
istream &operator >>(istream & is ,Student &s )
{
is>>s.num>>s.name>>s.sex>>s.score;
return is;
}
ostream &operator <<(ostream & os ,Student &s)
{
os<<"【学生信息】"<<"学号："<<s.num<<","<<"姓名："<<s.name<<","<<"性别："<<s.sex<<","<<"成绩："<<s.score<<endl;
return os;
}
Student& Student:: operator =(const Student &stu)
{
if(this!=&stu)
{
this->num=stu.num;
this->name=stu.name;
this->sex=stu.sex;
this->score=stu.score;
}
return *this;
}
int main()
{
Student stu;
cout<<"请分别输入该学生的学号、姓名、性别和成绩（中间用空格隔开）：";
cin >> stu;
cout << stu;
Student stu2;
stu2=stu;
cout<<stu2;
system("pause");
return 0;
}

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跳转到最佳答案楼层

ttyule1 · 发表于 2020-6-21 19:12:45

各位大佬帮帮忙！

sunrise085 · 发表于 2020-6-21 20:01:43

这个最佳答案由 sunrise085 给出，感谢 sunrise085 的回答。

单击隐藏图章

#include <iostream>
#include <string>
using namespace std;
class Student
{
private:
int num;
string name;
char sex;
float score;
public:
Student(){}
Student(int nu,string na,char se='M',float sc=0)
{
num=nu;
name=na;
sex=se;
score = sc;
}
friend istream & operator >>(istream&,Student &);
friend ostream & operator <<(ostream&,Student &);
Student & operator =(const Student &);
};
istream &operator >>(istream & is ,Student &s )
{
is>>s.num>>s.name>>s.sex>>s.score;
return is;
}
ostream &operator <<(ostream & os ,Student &s)
{
os<<"【学生信息】"<<"学号："<<s.num<<","<<"姓名："<<s.name<<","<<"性别："<<s.sex<<","<<"成绩："<<s.score<<endl;
return os;
}
Student& Student:: operator =(const Student &stu)
{
if(this!=&stu)
{
this->num=stu.num;
this->name=stu.name;
this->sex=stu.sex;
this->score=stu.score;
}
return *this;
}
int main()
{
Student stu;
cout<<"请分别输入该学生的学号、姓名、性别和成绩（中间用空格隔开）：";
cin >> stu;
cout << stu;
Student stu2;
stu2=stu;
cout<<stu2;
system("pause");
return 0;
}

复制代码

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