[untitled] 8 simplified address book

 1）

220529

#include<iostream>
using namespace std;
#include<string>
#define MAX 100

void showmeau() {// Display directory function 
	cout << "\t Welcome to contacts " << endl;
	cout << "\t\t Please select 0-4" << endl;
	cout << "\t1. Add personnel " << endl;
	cout << "\t2. Show people " << endl;
	cout << "\t3. Find people " << endl;
	cout << "\t4. Remove personnel " << endl;
	cout << "\t0. sign out " << endl;
}

void exitTuichu() {// Exit the address book function 
	cout << " Thank you for using , Quit successfully " << endl;
	return;
}

// Define human structure 
struct Person {
	string name;
	string eleDianhua;
};

struct Person personarr[MAX];// Define the address book structure 

int sizerenshu = 0;// Record the number of people deposited 

void tianJiarenyuan() {// Add personnel function 
	if (sizerenshu <= MAX) {
		string name1;
		string eleDIanhua1;
		Person per1;
		cout << " Please enter the name of the person " << endl;
		cin >> name1;
		cout << " Please enter the phone number of the person " << endl;
		cin >> eleDIanhua1;
		per1.name = name1;
		per1.eleDianhua = eleDIanhua1;
		//int sizerenshu = sizeof(personarr) / sizeof(personarr[0]);
		personarr[sizerenshu] = per1;
		sizerenshu++;
		cout << " Add success " << endl;
	}
	else
	{
		cout << " The number is full , Please delete and add " << endl;
		return;
	}
	cout << endl;
}

void showPer() {// Show address book owner function 
	if (sizerenshu>0)
	{
		for (int i = 0;i < sizerenshu;i++) {
			cout << " full name \t" << personarr[i].name << "\t Telephone \t" << personarr[i].eleDianhua << endl;
		}
	}
	else {
		cout << " The current address book is empty " << endl;
	}
}

void Cazaoren() {// Find human function , Find by name 
	if (sizerenshu > 0) {
		string name2;
		cout << " Please enter the name of the person you are looking for " << endl;
		cin >> name2;
		for (int i = 0;i < sizerenshu;i++) {
			if (personarr[i].name == name2) {
				cout << " Find success " << endl;
				cout << " full name \t" << personarr[i].name << "\t Telephone \t" << personarr[i].eleDianhua << endl;
			}
			else {
				cout << " To find the failure " << endl;
			}
		}
	}
	else {
		cout << " The current address book is empty " << endl;
	}
}

void Sancu() {// Personnel delete function 
	if (sizerenshu > 0) {
		for (int i = 0;i < sizerenshu;i++) {
			personarr[i] = {};
			cout << " Delete successful " << endl;
			sizerenshu--;
		}
	}
	else {
		cout << " The current address book is empty " << endl;
	}
}

// Test functions 
void text() {
	while (true) {
		showmeau();
		int xuanZhe = 0;
		int xuanze = 0;
		cin >> xuanze;
		xuanZhe = (int)xuanze;
		cout << xuanze << endl;
		cout << xuanZhe << endl;
		switch (xuanZhe) {
		case 1://1. Add personnel 
			tianJiarenyuan();
			system("pause");
			system("cls");
			break;
		case 2://2. Show people 
			showPer();
			system("pause");
			system("cls");
			break;
		case 3://3. Find people 
			Cazaoren();
			system("pause");
			system("cls");
			break;
		case 4://4. Remove personnel 
			Sancu();
			system("pause");
			system("cls");
			break;
		case 0://0. sign out 
			exitTuichu();
			system("pause");
			system("cls");
			return;
		}
	}
	
}
// The main function 
int main() {
	text();
	//int sizerenshu = sizeof(personarr) / sizeof(personarr[0]);
	//cout << sizerenshu << endl;
	system("pause");
}

//. Mail list 
//1. Add personnel 
//2. Show people 
//3. Find people 
//4. Remove personnel 
//0. sign out 

  Purpose ：

• Summarize and apply ,
• The implementation of address book is relatively simple
• switch Statement choice of function selection ,
• while Statement to repeat the function ,
• for Statement to traverse the address book array members 、 add to 、 Display and other functions of the cycle
• Functions are written separately
• if Statement to judge whether the address book is empty

The process ：

• Function options display functions --- Implement exit function --- Define personnel structure 、 Structure array --- Define global variables sizerenshu--- Other functions

analysis

• ① With add , Show , lookup , Delete and other functions . Unmodified functions . Write functions separately in different functions , It can realize the concretization of functions , It should be process oriented .
• ② Using the operation of cycling and screen clearing can make the interface more concise ,
• ③ Application return Exit function directly , You can exit the loop and keep the result true
• ④ Application sizerenshu The global variable of the array makes reasonable statistics on the members stored in the array , It is convenient and enriches other functions  

There are known problems ：

• ① The name entered is not , Judge whether the phone is legal
• ② Dialing is not implemented , Check functions such as dialing