Address book (implemented in C language)

Implement an address book:

1. Can save 100 people’s information (name, age, gender, phone number, address)

2. Add people’s information

3. Delete the information of the specified contact person

4. Find the information of the specified contact person

5. Modify the information of the designated contact person

6. Sort address book information

7. Display information of all contacts

1.Implementation of menu

void menu()
{
	printf("********************************\n");
	printf("**** 1. add        2. del   ****\n");
	printf("**** 3. search     4.modify ****\n");
	printf("**** 5. show       6. sort  ****\n");
	printf("**** 0. exit                ****\n");
	printf("********************************\n");
}

2.Address book main function

After designing the menu, next design the packaging for the main function

int main()
{
	int input = 0;
	//创建通讯录
	Contact con;//通讯录
	//初始化通讯录
	InitContact(&con);

	do
	{
		menu();
		printf("请输入你的选择:>");
		scanf("%d", &input);
		switch (input)
		{
		case ADD:
			AddContact(&con);
			break;
		case DEL:
			DelContact(&con);
			break;
		case SEARCH:
			SearchContact(&con);
			break;
		case MODIFY:
			ModifyContact(&con);
			break;
		case SHOW:
			ShowContact(&con);
			break;
		case SORT:
			break;
		case EXIT:
			//保存通讯录中的数据到文件中
			SaveContact(&con);
			DestroyContact(&con);
			printf("退出通讯录\n");
			break;
		default:
			printf("选择错误，重新选择\n");
			break;
		}
	} while (input);

	return 0;
}

3.Enumerate the internal options of the main function

The characters we enter in the branch loop case inside the main function above are for ease of understanding, but this cannot achieve the original intention of using numbers to select menu options, so we need to enumerate these selection functions to achieve such a Effect.

enum Option
{
	EXIT,//0
	ADD,
	DEL,
	SEARCH,
	MODIFY,
	SHOW,
	SORT
};

This makes it much more convenient and clear.

4.Define contacts and address book

1. Define the content of the contact

typedef struct PeoInfo
{
	char name[NAME_MAX];
	int age;
	char sex[SEX_MAX];
	char tele[TELE_MAX];
	char addr[ADDR_MAX];
};

2. Definition of the content of the address book

typedef struct Contact
{
	PeoInfo* data;//存放数据
	int sz;//记录的时当前通讯录中存放的人的信息个数
	int capacity;//记录的是通讯录的当前容量
}Contact;

5.Declare global variables

Define macros to replace some frequently used tedious content

#define NAME_MAX 20
#define SEX_MAX 5
#define TELE_MAX 12
#define ADDR_MAX 30
#define MAX 100

6.Initialize address book

Although this address book is relatively simple, the sparrow is small and has all the internal organs. In order to ensure complete functions and assign values ​​to variables, we should initialize it.

void InitContact(Contact* pc)
{
	assert(pc);

	pc->sz = 0;
	pc->capacity = DEFAULT_SZ;
	pc->data = calloc(pc->capacity, sizeof(PeoInfo));
	if (pc->data == NULL)
	{
		perror("InitContact->calloc");
		return;
	}
	//加载文件中的信息到通讯录
	LoadContact(pc);
}

7.Search for contacts by name

static int FindByName(Contact* pc, char name[])
{
	assert(pc);
	int i = 0;
	for (i = 0; i < pc->sz; i++)
	{
		if (strcmp(pc->data[i].name, name) == 0)
		{
			return i;
		}
	}
	return -1;//找不到
}

8.Implement the address book function

1. Add contacts

void AddContact(Contact* pc)
{
	assert(pc);
	//增加容量
	CheckCapacity(pc);
	//增加信息
	printf("请输入名字:");
	scanf("%s", pc->data[pc->sz].name);
	printf("请输入年龄:");
	scanf("%d", &(pc->data[pc->sz].age));
	printf("请输入性别:");
	scanf("%s", pc->data[pc->sz].sex);
	printf("请输入电话:");
	scanf("%s", pc->data[pc->sz].tele);
	printf("请输入地址:");
	scanf("%s", pc->data[pc->sz].addr);

	//
	pc->sz++;
	printf("增加成功\n");
}

2.Show all contacts

void ShowContact(const Contact* pc)
{
	assert(pc);
	if (pc->sz == 0)
	{
		printf("通讯录为空，无需打印\n");
		return;
	}
	int i = 0;
	//名字  年龄  性别  电话    地址
	//xxx   xxx  xxx  xxx     xxx
	printf("%-20s%-5s%-5s%-12s%-30s\n", "名字", "年龄", "性别", "电话", "地址");
	for (i = 0; i < pc->sz; i++)
	{
		//打印每个人的信息
		printf("%-20s%-5d%-5s%-12s%-30s\n",
			pc->data[i].name, pc->data[i].age, pc->data[i].sex, pc->data[i].tele, pc->data[i].addr);
	}
}

3. Delete contacts

void DelContact(Contact* pc)
{
	char name[NAME_MAX];
	assert(pc);
	if (pc->sz == 0)
	{
		printf("通讯录为空，无法删除\n");
		return;
	}
	printf("输入要删除人的名字:");
	scanf("%s", name);//zhangsan
	//找到名字为name的人
	int ret = FindByName(pc, name);
	if (ret == -1)
	{
		printf("要删除的人不存在\n");
		return;
	}
	//删除这个人
	int i = 0;

	for (i = ret; i < pc->sz - 1; i++)
	{
		pc->data[i] = pc->data[i + 1];
	}

	pc->sz--;
	printf("删除成功\n");
}

Delete hha

4. Find contacts

void SearchContact(Contact* pc)
{
	char name[NAME_MAX];
	assert(pc);
	printf("请输入要查找人的名字:");
	scanf("%s", name);
	int ret = FindByName(pc, name);
	if (ret == -1)
	{
		printf("要查找的人不存在\n");
		return;
	}
	//显示出来
	printf("%-20s%-5s%-5s%-12s%-30s\n", "名字", "年龄", "性别", "电话", "地址");
	printf("%-20s%-5d%-5s%-12s%-30s\n",
		pc->data[ret].name, pc->data[ret].age, pc->data[ret].sex, pc->data[ret].tele, pc->data[ret].addr);
}

Find joyful

5. Modify contacts

void ModifyContact(Contact* pc)
{
	char name[NAME_MAX];
	assert(pc);
	printf("请输入要修改人的名字:");
	scanf("%s", name);
	int ret = FindByName(pc, name);
	if (ret == -1)
	{
		printf("要修改的人不存在\n");
		return;
	}
	//修改
	printf("请输入名字:");
	scanf("%s", pc->data[ret].name);
	printf("请输入年龄:");
	scanf("%d", &(pc->data[ret].age));
	printf("请输入性别:");
	scanf("%s", pc->data[ret].sex);
	printf("请输入电话:");
	scanf("%s", pc->data[ret].tele);
	printf("请输入地址:");
	scanf("%s", pc->data[ret].addr);

	printf("修改成功\n");
}

Change Xi Yangyang's address from "Qingqing Grassland" to "Yangcun"

6. Sort (by name)

//按姓名排序通讯录内容
void SortContact(struct Contact *ps)
{
    if (ps->size <= 0){
		printf("通讯录中没有联系人，请添加!\n");
	}
	int i = 0;
	int j = 0;
	for (i = 0; i< ps->size - 1; i++)
	{
		for (j = 0; j< ps->size - i - 1; j++)
		{
			if (strcmp( ps->data[j].name, ( ps->data[j + 1]).name) > 0)
			{
                PeoInform tmp;
				tmp = ps->data[j];
				ps->data[j] = ps->data[j + 1];
				ps->data[j + 1] = tmp;
			}
		}
		printf("排序成功！\n");
	}
}

9、Complete adjustment

#define _CRT_SECURE_NO_WARNINGS 1
#include <assert.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define NAME_MAX 20
#define SEX_MAX 5
#define TELE_MAX 12
#define ADDR_MAX 30
#define MAX 100
#define DEFAULT_SZ 3
#define DEFAULT_INC 2
//类型的声明
typedef struct PeoInfo
{
	char name[NAME_MAX];
	int age;
	char sex[SEX_MAX];
	char tele[TELE_MAX];
	char addr[ADDR_MAX];
}PeoInfo;

typedef struct Contact
{
	PeoInfo* data;//存放数据
	int sz;//记录的时当前通讯录中存放的人的信息个数
	int capacity;//记录的是通讯录的当前容量
}Contact;

//初始化通讯录
void InitContact(Contact* pc);

//增加联系人
void AddContact(Contact* pc);

//显示所有的联系人
void ShowContact(const Contact* pc);

//删除指定联系人
void DelContact(Contact* pc);

//查找指定联系人
void SearchContact(Contact* pc);

//修改指定联系人
void ModifyContact(Contact* pc);

//销毁通讯录
void DestroyContact(Contact* pc);


//保存信息到文件
void SaveContact(Contact* pc);

//加载文件信息到通讯录
void LoadContact(Contact* pc);

void CheckCapacity(Contact* pc);


void LoadContact(Contact* pc)
{
	FILE* pf = fopen("contact.txt", "rb");
	if (pf == NULL)
	{
		perror("LoadContact");
		return;
	}
	//读文件
	PeoInfo tmp = { 0 };
	while (fread(&tmp, sizeof(PeoInfo), 1, pf))
	{
		CheckCapacity(pc);
		pc->data[pc->sz] = tmp;
		pc->sz++;
	}

	fclose(pf);
	pf = NULL;
}

//文件版本的初始化函数
void InitContact(Contact* pc)
{
	assert(pc);

	pc->sz = 0;
	pc->capacity = DEFAULT_SZ;
	pc->data = calloc(pc->capacity, sizeof(PeoInfo));
	if (pc->data == NULL)
	{
		perror("InitContact->calloc");
		return;
	}
	//加载文件中的信息到通讯录
	LoadContact(pc);
}


void CheckCapacity(Contact* pc)
{
	if (pc->sz == pc->capacity)
	{
		PeoInfo* ptr = (PeoInfo*)realloc(pc->data, (pc->capacity + DEFAULT_INC) * sizeof(PeoInfo));
		if (ptr != NULL)
		{
			pc->data = ptr;
			pc->capacity += DEFAULT_INC;
			printf("增容成功\n");
		}
		else
		{
			perror("AddContact->realloc");
			return;
		}
	}

}

void DestroyContact(Contact* pc)
{
	free(pc->data);
	pc->data = NULL;
	pc->sz = 0;
	pc->capacity = 0;
}

void AddContact(Contact* pc)
{
	assert(pc);
	//增加容量
	CheckCapacity(pc);
	//增加信息
	printf("请输入名字:");
	scanf("%s", pc->data[pc->sz].name);
	printf("请输入年龄:");
	scanf("%d", &(pc->data[pc->sz].age));
	printf("请输入性别:");
	scanf("%s", pc->data[pc->sz].sex);
	printf("请输入电话:");
	scanf("%s", pc->data[pc->sz].tele);
	printf("请输入地址:");
	scanf("%s", pc->data[pc->sz].addr);

	//
	pc->sz++;
	printf("增加成功\n");
}

void ShowContact(const Contact* pc)
{
	assert(pc);
	if (pc->sz == 0)
	{
		printf("通讯录为空，无需打印\n");
		return;
	}
	int i = 0;
	//名字  年龄  性别  电话    地址
	//xxx   xxx  xxx  xxx     xxx
	printf("%-20s%-5s%-5s%-12s%-30s\n", "名字", "年龄", "性别", "电话", "地址");
	for (i = 0; i < pc->sz; i++)
	{
		//打印每个人的信息
		printf("%-20s%-5d%-5s%-12s%-30s\n",
			pc->data[i].name, pc->data[i].age, pc->data[i].sex, pc->data[i].tele, pc->data[i].addr);
	}
}

static int FindByName(Contact* pc, char name[])
{
	assert(pc);
	int i = 0;
	for (i = 0; i < pc->sz; i++)
	{
		if (strcmp(pc->data[i].name, name) == 0)
		{
			return i;
		}
	}
	return -1;//找不到
}

void DelContact(Contact* pc)
{
	char name[NAME_MAX];
	assert(pc);
	if (pc->sz == 0)
	{
		printf("通讯录为空，无法删除\n");
		return;
	}
	printf("输入要删除人的名字:");
	scanf("%s", name);//zhangsan
	//找到名字为name的人
	int ret = FindByName(pc, name);
	if (ret == -1)
	{
		printf("要删除的人不存在\n");
		return;
	}
	//删除这个人
	int i = 0;

	for (i = ret; i < pc->sz - 1; i++)
	{
		pc->data[i] = pc->data[i + 1];
	}

	pc->sz--;
	printf("删除成功\n");
}

void SearchContact(Contact* pc)
{
	char name[NAME_MAX];
	assert(pc);
	printf("请输入要查找人的名字:");
	scanf("%s", name);
	int ret = FindByName(pc, name);
	if (ret == -1)
	{
		printf("要查找的人不存在\n");
		return;
	}
	//显示出来
	printf("%-20s%-5s%-5s%-12s%-30s\n", "名字", "年龄", "性别", "电话", "地址");
	printf("%-20s%-5d%-5s%-12s%-30s\n",
		pc->data[ret].name, pc->data[ret].age, pc->data[ret].sex, pc->data[ret].tele, pc->data[ret].addr);
}
//按姓名排序通讯录内容
void SortContact(struct Contact* ps)
{
	if (ps->sz <= 0) {
		printf("通讯录中没有联系人，请添加!\n");
	}
	int i = 0;
	int j = 0;
	for (i = 0; i < ps->sz - 1; i++)
	{
		for (j = 0; j < ps->sz - i - 1; j++)
		{
			if (strcmp(ps->data[j].name, (ps->data[j + 1]).name) > 0)
			{
				PeoInfo tmp;
				tmp = ps->data[j];
				ps->data[j] = ps->data[j + 1];
				ps->data[j + 1] = tmp;
			}
		}
		printf("排序成功！\n");
	}
}

void ModifyContact(Contact* pc)
{
	char name[NAME_MAX];
	assert(pc);
	printf("请输入要修改人的名字:");
	scanf("%s", name);
	int ret = FindByName(pc, name);
	if (ret == -1)
	{
		printf("要修改的人不存在\n");
		return;
	}
	//修改
	printf("请输入名字:");
	scanf("%s", pc->data[ret].name);
	printf("请输入年龄:");
	scanf("%d", &(pc->data[ret].age));
	printf("请输入性别:");
	scanf("%s", pc->data[ret].sex);
	printf("请输入电话:");
	scanf("%s", pc->data[ret].tele);
	printf("请输入地址:");
	scanf("%s", pc->data[ret].addr);

	printf("修改成功\n");
}


void SaveContact(Contact* pc)
{
	FILE* pf = fopen("contact.txt", "wb");
	if (pf == NULL)
	{
		perror("SaveContact");
		return;
	}
	//写信息到文件
	int i = 0;
	for (i = 0; i < pc->sz; i++)
	{
		//fwrite(&(pc->data[i]), sizeof(PeoInfo), 1, pf);
		fwrite(pc->data + i, sizeof(PeoInfo), 1, pf);
	}

	fclose(pf);
	pf = NULL;
}
void menu()
{
	printf("********************************\n");
	printf("**** 1. add        2. del   ****\n");
	printf("**** 3. search     4.modify ****\n");
	printf("**** 5. show       6. sort  ****\n");
	printf("**** 0. exit                ****\n");
	printf("********************************\n");
}

enum Option
{
	EXIT,//0
	ADD,
	DEL,
	SEARCH,
	MODIFY,
	SHOW,
	SORT
};

int main()
{
	int input = 0;
	//创建通讯录
	Contact con;//通讯录
	//初始化通讯录
	InitContact(&con);

	do
	{
		menu();
		printf("请输入你的选择:>");
		scanf("%d", &input);
		switch (input)
		{
		case ADD:
			AddContact(&con);
			break;
		case DEL:
			DelContact(&con);
			break;
		case SEARCH:
			SearchContact(&con);
			break;
		case MODIFY:
			ModifyContact(&con);
			break;
		case SHOW:
			ShowContact(&con);
			break;
		case SORT:
			SortContact(&con);
			break;
		case EXIT:
			//保存通讯录中的数据到文件中
			SaveContact(&con);
			DestroyContact(&con);
			printf("退出通讯录\n");
			break;
		default:
			printf("选择错误，重新选择\n");
			break;
		}
	} while (input);


	return 0;
}