C++实现通讯录功能

C++实现通讯录功能

整体代码十分简单，但有一点值得初学者注意，比如输入年龄的时候，应该存入一个整形的数字，此时就需要判断键盘输入的数据类型是否为整形，当数据类型不是整形的时候，就cout一条字符串告诉用户输入内容格式不正确，重新输入。

通过正则表达式来实现这个判别功能。代码如下：

在代码开头需加上#include "regex"

bool IsRegexInput(string str)          // 使用正则表达式进行匹配，
{
	bool flag;
	flag = true;
	regex r("\d{1,3}");
	while (!(flag = regex_match(str, r)))
	{
		return flag;
	}
	return flag;
}

 下面是功能函数的代码片段（以输入年龄为例），

string age;
int i_age;
cout << "请输入年龄：" << endl;
cin >> age;
while (!IsRegexInput(age)) // 判断输入的内容是否为整形
	{
		cout << "输入内容格式有误，请输入数字：" << endl;
		cin >> age;
	}
i_age = atoi(age.c_str());//输入没有问题，进行字符串转换为整形
		
abs->person[abs->renshu].age = i_age;

全部代码如下：

#include 
#include 
#include 
#include "regex"
using namespace std;
#define max 100

struct lianxiren
{
	string name;
	int sex;
	int age;
	string mobile_number;
	string address;
};
struct tongxunlu
{
	struct lianxiren person[max];
	int renshu=0;
	
};

bool IsRegexInput(string str)          // 使用正则表达式进行匹配，
{
	bool flag;
	flag = true;
	regex r("\d{1,3}");
	while (!(flag = regex_match(str, r)))
	{
		return flag;
	}
	return flag;
}

void show_caidan()
{
	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 << "*  7.退出通讯录  *" << endl;
	
}

void add_person(tongxunlu * abs)
{
	if (abs->renshu > max)
	{
		cout << "通讯录已满" << endl;
		system("pause");
	}
	else
	{
		cout << "请输入姓名：" << endl;
		string name;
		cin >> name;
		abs->person[abs->renshu].name = name;

		cout << "请输入性别：1=男 2=女" << endl;
		string sex;
		int i_sex;
		while (true)
		{
			cin >> sex;
			while (!IsRegexInput(sex)) // 判断输入的内容是否为整形
			{
				cout << "输入内容格式有误，请输入数字："<< endl;
				cin >> sex;
			}
			i_sex = atoi(sex.c_str());//输入没有问题，进行字符串转换为整形
			if (i_sex == 1 || i_sex == 2)
			{
				abs->person[abs->renshu].sex = i_sex;
				break;
			}
			else
			{
				cout << "请输入正确的性别 :)";
			}
		}
		string age;
		int i_age;
		cout << "请输入年龄：" << endl;
		cin >> age;
		while (!IsRegexInput(age)) // 判断输入的内容是否为整形
		{
			cout << "输入内容格式有误，请输入数字：" << endl;
			cin >> age;
		}
		i_age = atoi(age.c_str());//输入没有问题，进行字符串转换为整形
		
		abs->person[abs->renshu].age = i_age;
		cout << "请输入手机号码：" << endl;
		string number;
		cin >> number;
		abs->person[abs->renshu].mobile_number = number;
		cout << "请输入地址：" << endl;
		string address;
		cin >> address;
		abs->person[abs->renshu].address = address;

		abs->renshu++;
		cout << "已成功添加联系人 :)" << endl;
		system("pause");
		system("cls");
	}

}
int is_exist(tongxunlu * abs)
{
	if (abs->renshu == 0)
	{
		cout << "通讯录为空" << endl;
		return 0;
	}
	return 1;
}

void cout_person(tongxunlu * abs,int i)
{
	string sex;
	if (abs->person[i].sex == 1)
	{
		sex = "男";
	}
	else
	{
		sex = "女";
	}
	cout << abs->person[i].name
		<< "t" << sex
		<< "t" << abs->person[i].age
		<< "t" << abs->person[i].mobile_number
		<< "t" << abs->person[i].address << endl;
}
void show_person(tongxunlu * abs)
{
	is_exist(abs);
	for (int i = 0; i < abs->renshu; i++)
	{
		cout_person(abs, i);;
	}
	system("pause");
	system("cls");
}

void delete_person(tongxunlu* abs)
{
	
	int flag = is_exist(abs);
	if (flag == 1)
	{
		string name;
		int i;
		cout << "请输入要删除的联系人姓名：" << endl;
		cin >> name;
		if (name != "-1")
		{

			for (i = 0; i < abs->renshu; i++)
			{
				if (abs->person[i].name == name)
				{
					for (int j = i; i < abs->renshu - 1; j++)
					{
						abs->person[j] = abs->person[j + 1];
					}
					abs->renshu--;
					cout << "已成功删除该联系人" << endl;
					break;
				}
			}
			if (i >= abs->renshu)
			{
				cout << "该联系人不存在" << endl;
			}
		}
	}
	system("pause");
	system("cls");
}

void locate_person(tongxunlu* abs)
{
	is_exist(abs);
	string name;
	cout << "请输入要查找的联系人姓名：" << endl;
	cin >> name;
	for (int i = 0; i < abs->renshu; i++)
	{
		if (abs->person[i].name == name)
		{
			cout_person(abs,i);
			break;
		}
	}
	system("pause");
	system("cls");
}

void modify_person(tongxunlu* abs)
{

	int flag=is_exist(abs);
	if (flag == 1)
	{
		string l_name;
		int i;
		cout << "请输入要修改的联系人姓名：" << endl;
		cin >> l_name;
		for (i = 0; i < abs->renshu; i++)
		{
			if (abs->person[i].name == l_name)
			{
				cout << "修改前联系人的信息如下：" << endl;
				cout_person(abs, i);
				cout << "不需要修改的项可以输入-1跳过" << endl;
				cout << "请输入姓名：" << endl;
				string name;
				cin >> name;
				if (name != "-1")
				{
					abs->person[i].name = name;
				}
				cout << "请输入性别：1=男 2=女" << endl;
				string sex;
				int i_sex;
				cin >> sex;
				if (sex != "-1")
				{
					while (!(IsRegexInput(sex)))
					{
						cout << "输入内容格式有误，请输入数字：" << endl;
						cin >> sex;
					}
					i_sex = atoi(sex.c_str());
					while (true)
					{
						cin >> sex;
						if (i_sex == 1 || i_sex == 2)
						{
							abs->person[i].sex = i_sex;
							break;
						}
						else
						{
							cout << "请输入正确的性别 :)";
						}
					}
				}
				string age;
				int i_age;
				cout << "请输入年龄：（输入-1跳过）" << endl;
				cin >> age;
				if (age != "-1")
				{
					while (!(IsRegexInput(age)))
					{
						cout << "输入内容格式有误，请输入数字：" << endl;
						cin >> age;
					}
					i_age = atoi(age.c_str());
					abs->person[i].age = i_age;
				}
				cout << "请输入手机号码：" << endl;
				string number;
				cin >> number;
				if (number != "-1")
				{
					abs->person[i].mobile_number = number;
				}
				cout << "请输入地址：" << endl;
				string address;
				cin >> address;
				if (address != "-1")
				{
					abs->person[i].address = address;
				}

				cout << "已成功修改联系人 :)" << endl;
				cout << "修改后的联系人信息如下：" << endl;
				cout_person(abs, i);
				break;
			}
		}
		if (i >= abs->renshu)
		{
			cout << "该联系人不存在" << endl;
		}
	}
	system("pause");
	system("cls");
}

void clear_person(tongxunlu* abs)
{
	abs->renshu = 0;
	cout << "通讯录已清空" << endl;
	system("pause");
	system("cls");
}

int main()
{
	struct tongxunlu li1;
	int select = 0;
	while (true)
	{
		show_caidan();
		cout << "请输入功能号：" << endl;
		cin >> select;
		switch (select)
		{
		case 1:
			add_person(&li1);
			break;
		case 2:
			show_person(&li1);
			break;
		case 3:
			delete_person(&li1);
			break;
		case 4:
			locate_person(&li1);
			break;
		case 5:
			modify_person(&li1);
			break;
		case 6:
			clear_person(&li1);
			break;
		case 7:
			cout << "欢迎下次使用 :)" << endl;
			system("pause");
			return 0;
			
		default:
			break;

		}
	}
	system("pause");
	return 0;
	
}

希望对你有所帮助。