c++ 引用调用例子形参指针经典代码

偏执的太偏执、 2022-05-28 06:41 191阅读 0赞

\#include<iostream>  
\#include<string>  
using namespace std;  
class Student  
\{  
public:  
string name;  
int score;  
Student(string name, int score)  
\{  
this->name = name;  
this->score=score;  
cout << name << "的成绩是" << score << endl;  
\}  
\};  
void show(Student &a, Student &b)  
\{  
  
if (a.score < b.score)  
\{  
cout << a.name << "比" << b.name << "的成绩低了" << -(a.score - b.score) << "分" << endl;  
\}  
if (a.score > b.score)  
\{  
cout << a.name << "比" << b.name << "的成绩高了" << a.score - b.score << "分" << endl;  
\}  
if (a.score == b.score)  
\{  
cout << "两者成绩一样" << endl;  
\}  
\}  
int main()  
\{  
Student s\[\] = \{ Student("Tom", 80),  
Student("Jerry", 95),  
Student("Garfield", 85) \};  
cout << endl;  
show(s\[0\], s\[1\]);  
show(s\[1\], s\[2\]);  
return 0;

void show(Student &a, Student &b)其中引用调用是s\[\],用的是&符号

而另外一种

\#include<iostream>  
\#include<string>  
using namespace std;  
class Goat  
\{  
private:  
string name;  
int weight;  
  
  
public:  
  
  
Goat(string name, int weight)  
\{  
this->name = name;  
this->weight = weight;  
  
  
\}  
void sleep()  
\{  
int n = 2;  
weight += n;  
cout << name << "睡了一觉， 体重增长" << n << "斤" << endl;  
\}  
string getName()  
\{  
return name;  
\}  
int getWeight()  
\{  
return weight;  
  
  
\}  
\};  
class Wolf  
\{  
  
  
private:  
string name;  
int weight;  
public:  
  
  
Wolf(string name, int weight)  
\{  
this->name = name;  
this->weight = weight;  
\}  
  
  
void eat(Goat \*g)  
\{  
int n = 95;  
weight += n;  
cout << name << "吃了" << (\*g).getName() << ", 体重增长" << n << "斤" << endl;  
\}  
string getName()  
\{  
return name;  
\}  
int getWeight()  
\{  
return weight;  
  
  
\}  
\};  
void print(Goat \*g)  
\{  
cout << (\*g).getName() << "是一只" << (\*g).getWeight() << "斤的羊" << endl;  
\}  
void print(Wolf \*w)  
\{  
cout << (\*w).getName() << "是一只" << (\*w).getWeight() << "斤的狼" << endl;  
\}  
int main()  
\{  
Goat \*g1 = new Goat("美羊羊", 95);  
Goat \*g2 = new Goat("暖羊羊", 120);  
Wolf \*w1 = new Wolf("小灰灰", 100);  
print(g1);  
print(g2);  
print(w1);  
g2->sleep();  
w1->eat(g1);  
print(g2);  
print(w1);  
return 0;  
\}  
  
void print(Goat \*g)中是将地址作为形参。