#ifndef COURSE_H
#define COURSE_H
#include <string>
using namespace std;
class Course
{
public:
Course(const string& courseName, int capacity);
~Course();
string getCourseName() const;
void addStudent(const string& name);
void dropStudent(const string& name);
string* getStudents() const;
int getNumberOfStudents() const;
private:
string courseName;
string* students;
int numberOfStudents;
int capacity;
};
#endif
int main()
{
Course course1("Data Structures", 10);
Course course2("Database Systems", 15);
course1.addStudent("Peter Jones");
course1.addStudent("Brian Smith");
course1.addStudent("Anne Kennedy");
course2.addStudent("Peter Jones");
course2.addStudent("Steve Smith");
cout << "Number of students in course1: "
<< course1.getNumberOfStudents() << endl;
string* students = course1.getStudents();
for (int i = 0; i < course1.getNumberOfStudents(); i++)
cout << students[i] << ", ";
cout << endl;
cout << "Number of students in course2: "
<< course2.getNumberOfStudents() << endl;
students = course2.getStudents();
for (int i = 0; i < course2.getNumberOfStudents(); i++)
cout << students[i] << ", ";
cout << endl;
return 0;
}
#include <iostream>
#include "Course.h"
using namespace std;
int main()
{
Course course1("C++", 10);
Course course2(course1);
course1.addStudent("Peter Pan");
course2.addStudent("Lisa Ma");
cout << "students in course1: " <<
course1.getStudents()[0] << endl;
cout << "students in course2: " <<
course2.getStudents()[0] << endl;
return 0;
}
添加学生时，若数组容量不够，则创建一个更大的数组，并将内容拷贝到新的数组 编写测试程序，测试实现的类 |
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看到你的帖子，就知道学期要结束了，又快放假了
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参考stl vector的源码实现。
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难过地up一下
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，STL vector 内存分配策略指数递增。。。。。。。。
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难过地up一下
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初学者感到看不懂…… |
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类实现
class Course
{
public:
Course(const string& courseName, int capacity);
~Course();
string getCourseName() const;
void addStudent(const string& name);
void dropStudent(const string& name);
string* getStudents() const;
int getNumberOfStudents() const;
private:
string courseName;
string* students;
int numberOfStudents;
int capacity;
};
Course::Course(const string& courseName, int capacity):courseName(courseName),capacity(capacity)
{
students = new string[capacity];
}
Course::~Course()
{
delete[]students;
students = nullptr;
capacity = 0;
numberOfStudents = 0;
}
string Course::getCourseName() const
{
return courseName;
}
void Course::addStudent(const string& name)
{
if (capacity == numberOfStudents) return;
students[numberOfStudents++] = name;
}
void Course::dropStudent(const string& name)
{
int i, j;
for (i = 0; i < numberOfStudents; i++)
{
if (students[i] == name) break;
}
if (i != numberOfStudents) //学生确实存在
{
if (1 == numberOfStudents)
{
delete[]students;
students = nullptr;
numberOfStudents = 0;
}
numberOfStudents--;
for (j = i; j < numberOfStudents; j++)
students[j] = students[j + 1];
}
}
string* Course::getStudents() const
{
return students;
}
int Course::getNumberOfStudents() const
{
return numberOfStudents;
}
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