通讯录管理系统开发日志

一直都觉得以项目为导向学习编程是一种很高效的学习编程的方法，我这段时期的主要学习任务是复习一下c++的基本语法，比起再一章一章的去学，写一个增删改查的小项目或许更能帮助我复习之前的知识点，同时也能增强自己的开发能力。我对这个小项目的目标是实现最基本的增删改查功能然后再用MFC做一个简单的UI界面。接下来我会将已经完成的功能模块代码展示出来。

文章目录

• 菜单功能
• 增加联系人功能
• 显示联系人功能
• 搜索联系人功能
• 修改联系人功能

菜单功能

`void menu()
{
	cout << "*********************************" << endl;
	cout << "******* 1、添加联系人 ***********" << endl;
	cout << "******* 2、显示联系人 ***********" << endl;
	cout << "******* 3、删除联系人 ***********" << endl;
	cout << "******* 4、查找联系人 ***********" << endl;
	cout << "******* 5、修改联系人 ***********" << endl;
	cout << "******* 6、清空联系人 ***********" << endl;
	cout << "******* 0、退出通讯录 ***********" << endl;
	cout << "*********************************" << endl;

}

增加联系人功能

//This funcation is designed to add contacts
void add_contacts( contact_book *abs)
{
	if(abs->book_size == MAX)
	{
		cout << "通讯录已满，无法添加！" << endl;
		return;
	}

	else//add a contact 
	{

		//add his name 
		string name;
		cout << "请输入姓名：" << endl;
		cin >> name;
		abs->book[abs->book_size].name = name;//问题①：这一语句的逻辑是什么？

		//add his sex
		cout << "请输入性别: " << endl;
		cout << "1 --- 男" << endl;
		cout << "0 --- 女" << endl;
		int sex = 0;

		while(true)//这个while(1)有很强的鲁棒性
		{
			//如果输入的是0或者1可以退出循环，因为输入的是正确值
			//如果输入有误，重新输入
			cin >> sex;
			if(sex == 0 || sex == 1)
			{
				abs->book[abs->book_size].sex = sex;
				break;
			}
			cout << "输入有误，请重新输入" << endl;
			
		}

		//add his age 
		cout << "请输入年龄： " << endl;
		int age = 0;
		cin >> age;
		abs->book[abs->book_size].age = age;


		//add his address
		cout << "请输入地址:" << endl;
		string address = string();//string类型的数据赋初值的方法
		cin >> address;
		abs->book[abs->book_size].address = address;
		

		//add his phone 
		cout << "请输入电话:" << endl;
		string phone = string();
		cin >> phone;
		abs->book[abs->book_size].phone = phone;

		abs->book_size++;

		cout << "添加成功" << endl;
		system("pause");
		system("cls");
	}

}

显示联系人功能

//This function is used to show all the contacts in the address book. 
void show_contacts(contact_book *abs)
{
	//If there aren't any contacts in the address book,it will show the sentence below.
	if(abs->book_size == 0)
	{
		cout << "该通讯录中没有联系人！" << endl;
	}

	//This for loop can show all the contacts in the address book.
	for(int i = 0;i < abs->book_size;i++)
	{
		cout << "姓名为：" << abs->book[i].name << "\t";
		cout << "性别为：" << abs->book[i].sex << "\t";
		cout << "年龄为：" << abs->book[i].age << "\t";
		cout << "地址为：" << abs->book[i].address << "\t";
		cout << "电话为：" << abs->book[i].phone << endl;
	}

	system("pause");//Press any keys to continue.
	system("cls");//All the contents before this sentece will disappear.
}

搜索联系人功能

//Try to search a particular contact in the address book.
void search_contact(contact_book *abs)
{
	string name;
	if(abs->book_size == 0)
	{
	   cout << "The address book is empty so you can't delete any contacts!" << endl;
	   system("pause");
	   system("cls");
	   return;//the return should be put in the end.
	}


	//input the name you want to search.
	cout << "Please input the name you want to search: " << endl;
	cin >> name;

	//Search this guy in the address book
	for(int i = 0;i < abs->book_size;i++)
	{
		if(name == abs->book[i].name)
		{
			cout << "name:" << abs->book[i].name << "\t";
			cout << "sex:"  << abs->book[i].sex  << "\t";
			cout << "age:"  << abs->book[i].age  << "\t";
			cout << "address:"  << abs->book[i].address  << "\t";
			cout << "phone:"  << abs->book[i].phone  << endl;//endl is different from above "\t".But without endl your UI would be in a mess.
		}
		else
		{
			cout << "No such a contact in this address book!" << endl;
			cout << "pause" << endl;//Press any keys to continue.
			cout << "cls" << endl;
		}
		
	}

}

修改联系人功能

//revise the information of some contact.
void revise_contact(contact_book *abs)
{
	string name;

	if(abs->book_size == 0)
	{
	   cout << "The address book is empty so you can't revise any contacts!" << endl;
	   system("pause");
	   system("cls");
	   return;//the return should be put in the end.
	}
	
	cout << "Input the name you want to revise: " << endl;
	cin >> name;

	for(int i = 0;i < abs->book_size;i++)
	{
		if(name == abs->book[i].name)
		{
			string new_name,new_sex,new_age,new_address,new_phone;
			cout << "请输入新的名字：" << endl;
			cin >> new_name;
			abs->book[i].name = new_name;
			cout << "请输入新的性别：" << endl;
			cin >> new_sex;
			abs->book[i].sex = new_sex;
			cout << "请输入新的年龄：" << endl;
			cin >> new_age;
			abs->book[i].age = new_age;
			cout << "请输入新的地址：" << endl;
			cin >> new_address;
			abs->book[i].address = new_address;
			cout << "请输入新的电话号码：" << endl;
			cin >> new_phone;
			abs->book[i].phone = new_phone;
			system("pause");//Press any keys to continue.
			system("cls");
		}
		else
		{
			cout << "No such a contact in this address book!" << endl;
			system("pause");//Press any keys to continue.
			system("cls");
		}

	}

}

待更新。。。