通讯录小项目

题目要求

可以存储1000人的信息，
个人信息包括姓名、电话、住址、年龄、性别。

提供方法：

1、添加联系人信息
2、删除指定联系人信息
3、查找指定联系人信息
4、修改指定联系人信息
5、显示所有联系人信息
6、清空所有联系人信息
7、以名字排序所有联系人

实现的功能以及所用知识

1、从文件读取和向文件写入信息
fopen、fclose、fscanf、fprintf
2、动态开辟空间存储联系人信息
malloc、realloc、free
3、添加按地址排序
offsetof、qsort、strcmp
4、转移表
函数指针数组

代码

tel.h

#ifndef __TEL_H__
#define __TEL_H__

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <search.h>
#include <malloc.h>
#include <assert.h>
#include <stddef.h>

#define NAME 20
#define SEX 5
#define PHONE 11
#define ADDRESS 20
#define EXPANSION 5

struct contact
{
    char name[NAME];
    char sex[SEX];
    unsigned short age;
    char phone[PHONE];
    char address[ADDRESS];
};

struct addressBook
{
    int num;
    int sz;
    struct contact* contacts;
};

void init_addressBook(struct addressBook* );
void read_file(struct addressBook*, FILE*);
void add_contact(struct addressBook*);
void delete_contact(struct addressBook*);
void lookup_contact(struct addressBook*);
void modify_contact(struct addressBook*);
void show_contact(struct addressBook*);
void empty_contact(struct addressBook*);
void sort_contact(struct addressBook*);
void write_file(struct addressBook*, FILE*);

#endif //__TEL_H__

text.c

#define _CRT_SECURE_NO_WARNINGS 1

#include "tel.h"

void menu()
{
    printf("************************************\n");
    printf("********        menu         *******\n");
    printf("*******  1,add      2,delete  ******\n");
    printf("*******  3,lookup   4,modify  ******\n");
    printf("*******  5,show     6,empty   ******\n");
    printf("*******  7,sort     0,exit    ******\n");
    printf("************************************\n");
}

int main()
{
    struct addressBook list;
    init_addressBook(&list);
    FILE *stream = fopen("text.txt", "r");
    read_file(&list, stream);
    fclose(stream);

    void(*operate_contact[8])(struct addressBook*) = \
    { NULL, add_contact, delete_contact, lookup_contact, \
    modify_contact, show_contact, empty_contact, sort_contact };
    //上面是一个转移表——函数指针数组的定义和赋值
    unsigned int input = 0;
    do{
        menu();
        printf("Please choose the operation of mail list >:\n");
        scanf("%d", &input);
        if (input > 7)
            printf("\nChoice is false, please choose again >:\n");
        else if (input > 0)
            operate_contact[input](&list);
            //上面是转移表的使用
    } while (input);

    stream = fopen("text.txt", "w");
    write_file(&list, stream);
    fclose(stream);
    free(list.contacts);
    list.contacts = NULL;
    return 0;
}

mailList.c

#define _CRT_SECURE_NO_WARNINGS 1

#include "tel.h"

void read_file(struct addressBook* plist, FILE* stream)
{
    assert(stream != NULL);
    fscanf(stream, "%d", &plist->sz);
    if (plist->sz == 0)
        return;
    if (plist->sz > EXPANSION)
    {
        plist->contacts = realloc(plist->contacts,\
            plist->sz*sizeof(struct contact));
        plist->num = plist->sz;
    }
    int i;
    for (i=0; i < plist->num; i++)
    {
        fscanf(stream, "%s%s%d%s%s", plist->contacts[i].name,\
            plist->contacts[i].sex, &plist->contacts[i].age,\
            plist->contacts[i].phone, plist->contacts[i].address);
    }
}


void init_addressBook(struct addressBook* plist)
{
    plist->num = EXPANSION;
    plist->sz = 0;
    plist->contacts = malloc(EXPANSION*sizeof(struct contact));
}

static struct contact* find_contact(struct addressBook* plist)
{
    int i;
    char name[NAME] = { 0 };
    printf("Please enter name >:\n");
    scanf("%s", name);

    for (i = 0; i < plist->sz; i++)
    {
        if (strcmp(plist->contacts[i].name, name) == 0)
            return (&plist->contacts[i]);
    }
    return NULL;
}

static void expand(struct addressBook* plist)
{
    plist->contacts = realloc(plist->contacts, \
        sizeof(struct contact)*(plist->num + EXPANSION));
    plist->num += EXPANSION;
}

void empty_contact(struct addressBook* plist)
{

    plist->num = 0;
    plist->sz = 0;
}

void add_contact(struct addressBook* plist)
{
    if (plist->sz == plist->num)
    {
        expand(plist);
    }
    printf("Please enter name >:\n");
    scanf("%s", plist->contacts[plist->sz].name);
    printf("Please enter sex >:\n");
    scanf("%s", plist->contacts[plist->sz].sex);
    printf("Please enter age >:\n");
    scanf("%d", &plist->contacts[plist->sz].age);
    printf("Please enter phone number >:\n");
    scanf("%s", plist->contacts[plist->sz].phone);
    printf("Please enter address >:\n");
    scanf("%s", plist->contacts[plist->sz].address);
    plist->sz++;
}

void delete_contact(struct addressBook* plist)
{
    struct contact* con = find_contact(plist);
    if (con == NULL)
    {
        printf("Without the contact information.\n");
        return;
    }
    int i = (char*)(&plist->contacts[plist->sz]) - (char*)con;
    char* dest = (char*)con;
    char* src = (char*)(con + 1);
    while (i--)
    {
        *dest++ = *src++;
    }
    plist->sz--;
}

void lookup_contact(struct addressBook* plist)
{
    struct contact* con = find_contact(plist);
    if (con == NULL)
    {
        printf("Without the contact information.\n");
        return;
    }
    printf("%-20s%-10s%-10s%-15s%-20s\n", \
        "name", "sex", "age", "phone", "address");
    printf("%-20s%-10s%-10d%-15s%-20s\n", con->name, \
        con->sex, con->age, con->phone, con->address);
}

void modify_contact(struct addressBook* plist)
{
    struct contact* con = find_contact(plist);
    if (con == NULL)
    {
        printf("Without the contact information.\n");
        return;
    }
    else
    {
        printf("Please enter sex >:\n");
        scanf("%s", plist->contacts[plist->sz].sex);
        printf("Please enter age >:\n");
        scanf("%d", &plist->contacts[plist->sz].age);
        printf("Please enter phone number >:\n");
        scanf("%s", plist->contacts[plist->sz].phone);
        printf("Please enter address >:\n");
        scanf("%s", plist->contacts[plist->sz].address);
    }
}

void show_contact(struct addressBook* plist)
{
    if (plist->sz == 0)
    {
        printf("No contact to show.\n");
        return;
    }
    printf("%-20s%-10s%-10s%-15s%-20s\n",\
        "name", "sex", "age", "phone", "address");
    int i;
    for (i = 0; i < plist->sz; i++)
    {
        printf("%-20s%-10s%-10d%-15s%-20s\n",
            plist->contacts[i].name, plist->contacts[i].sex,
            plist->contacts[i].age, plist->contacts[i].phone,
            plist->contacts[i].address);
    }
}

void empt_contact(struct addressBook* plist)
{
    plist->sz = 0;
}


static int compare_name(const void* name1, const void* name2)
{
    return strcmp((char*)name1, (char*)name2);
}

static int compare_address(const void* name1, const void* name2)
{
    int dev = offsetof(struct contact, address);
    return strcmp((char*)name1+dev, (char*)name2+dev);
}

void sort_contact(struct addressBook* plist)
{
    printf("Please choose the sorting method >:\n\
                1.by name    2.by address\n");
    int choice;
    scanf("%d", &choice);
    if (choice%2)
        qsort(plist->contacts, plist->sz, sizeof(struct contact), compare_name);
    else
        qsort(plist->contacts, plist->sz, sizeof(struct contact), compare_address);
}

void write_file(struct addressBook* plist, FILE* stream)
{
    assert(stream != NULL);
    fprintf(stream, "%d\n", plist->sz);
    int i;
    for (i = 0; i < plist->sz; i++)
    {
        fprintf(stream, "%s %s %d %s %s\n", plist->contacts[i].name,
            plist->contacts[i].sex, plist->contacts[i].age,
            plist->contacts[i].phone, plist->contacts[i].address);
    }
}