C++面向对象编程示例-优快云博客

本文通过具体的C++代码示例，展示了面向对象编程的基本概念，包括类的定义、对象的创建、静态成员变量和函数的应用，以及如何实现简单的数据封装和继承。通过学生信息管理系统的小例子，读者可以更好地理解C++面向对象编程的实际应用。

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#include <iostream>
#include <cstring>

using namespace std;

class NameString{
private:
char *str;
public:
NameString(char *s="...")
{
str = new char[strlen(s)+1];
strcpy(str,s);
// cout<<"构造 NameString OK!"<<endl;
}

void print()
{
cout<<str;
}

~NameString()
{
// cout<<"析构 NameString OK!"<<endl;
delete str;
}
};

class Student{
private:
int StudentNO;
NameString Name;
int Scores;
static int total_Scores;
static int total_Num;
public:
Student(int a,char *b,int c):StudentNO(a),Name(b),Scores(c)
{
total_Scores += c;
total_Num++;
// cout<<"构造 Student OK!"<<endl;
}

void print()
{
cout<<StudentNO<<'\t';
Name.print();
cout<<'\t'<<Scores<<endl;
}

void average()
{
cout<<"Average:"<<total_Scores/total_Num<<endl;
}

static void total_disp()
{
cout<<"Total_Scores:"<<total_Scores<<endl;
cout<<"Total_Num:"<<total_Num<<endl;
}

};

int Student::total_Scores = 0;
int Student::total_Num = 0;

int main()
{
Student st1(1,"wen",94);
Student st2(2,"hao",100);
Student st3(3,"lin",100);

cout<<"学号"<<'\t'<<"姓名"<<'\t'<<"成绩"<<endl;
st1.print();
st2.print();
st3.print();

Student::total_disp();

st1.average();

return 0;

}