c++——类

偏执的太偏执、 2023-10-10 08:52 17阅读 0赞

#include <iostream>
    using namespace std;
    
    class Box 
    { 
    public :
    	double length;
    	double breadth;
    	double height;
    
    	//成员函数声明
    	double getVolume(void);
    	void setLength(double len);
    	void setBreadth(double bre);
    	void setHeight(double hei);
    };
    
    //成员函数定义
    double Box::getVolume() 
    { 
    	return length * breadth*height;
    }
    
    void Box::setLength(double len)
    { 
    	length = len;
    }
    
    void Box::setBreadth(double bre) 
    { 
    	breadth = bre;
    }
    
    void Box::setHeight(double hei) 
    { 
    	height = hei;
    }
    
    int main() 
    { 
    	Box Box1;
    	Box Box2;
    	double volume = 0.0;
    
    	//
    	Box1.setLength(7.0);
    	Box1.setBreadth(8.0);
    	Box1.setHeight(9.0);
    
    	Box2.setLength(8.0);
    	Box2.setBreadth(9.0);
    	Box2.setHeight(10.0);
    
    	volume = Box1.getVolume();
    	cout << "Box1的体积：" << volume << endl;
    
    	volume = Box1.length*Box1.breadth*Box1.height;
    	cout << "Box1的体积：" << volume << endl;
    	
    	volume = Box2.length*Box2.breadth*Box2.height;
    	cout << "Box2的体积：" << volume << endl;
    
    	return 0;
    }

学生成绩

#include"pch.h"
    #include<iostream>
    #include <iomanip>
    #include <string>
    #include<cstdio>
    #include<cstring>
    
    using namespace std;
    class student { 
    public:
    	char name[20];
    	char sex[10];
    	float math;
    	float english;
    	float cprogram;
    	void input_name();
    	void input_sex();
    	void input_math();
    	void input_english();
    	void input_cprogram();
    	void input(class student *stu);
    	void show_student_message(class student *stu);
    };
    
    void student::input_name() { 
    	std::cout << "请输入学生姓名：" << endl;
    	cin.getline(name,sizeof(name));
    	cout << "学生姓名：" << name << endl;
    }
    
    void student::input_sex() { 
    	cout << "输入学生性别：" << endl;
    	cin.getline(sex,sizeof(sex));
    }
    
    void student::input_math() { 
    	cout << "输入学生数学：" << endl;
    	cin >> math;
    }
    
    void student::input_english() { 
    	cout << "请输入学生英语：" << endl;
    	cin >> english;
    }
    
    void student::input_cprogram() { 
    	cout << "请输入学生c语言：" << endl;
    	cin >> cprogram;
    }
    
    void student::show_student_message(class student *stu) { 
    	cout << "学生姓名：" << stu->name << endl;
    	cout << "学生性别：" << stu->sex << endl;
    	cout << "学生数学：" << stu->math << endl;
    	cout << "学生英语：" << stu->english << endl;
    	cout << "学生c语言：" << stu->cprogram << endl;
    }
    
    void student::input(class student *stu) { 
    	stu->input_name();
    	stu->input_sex();
    	stu->input_math();
    	stu->input_english();
    	stu->input_cprogram();
    }
    
    int main() 
    { 
    	student xiaoming;
    	student *xiaoming_point = &xiaoming;
    	xiaoming.input(xiaoming_point);
    	xiaoming.show_student_message(xiaoming_point);
    	return 0;
    }