用C语言编写简单的通讯录(大一课程作业)

该系统概述：

因本人只学习了C语言的基础部分，所以编写该系统时只使用了一个C文件。存储通讯录信息以txt文件方式保存。

系统设计：

显示主菜单主函数：int main()；

创建录入信息子函数：void book_create()；

显示信息子函数1：void book_reada(int*count)；

显示信息子函数2：void book_readb(int*count)；

查询信息子函数：void book_search()；

添加信息子函数：void book_insert(int count)；

修改信息子函数：void books_change()；

删除信息子函数：void book_delete()；

功能测试：

1、启动系统：

2、创建通讯录：

输入1，回车

3、添加联系人信息：

输入4，回车，开始选择添加类型：

输入“是”，开始输入信息

添加一个联系人后，填入“是”可以继续添加

填入“否”则停止添加，并退出子函数，并且需选择6选项才能使信息保存至文件！！

保存成功！选择7选项可查看目前的联系人方式，注意，关闭程序重启时不能选择7选项！

另一种显示方式：重启程序后，选择8选项

再显示前需确认关闭前添加联系人的个数！例如添加两个联系人，输入“2”

显示出关闭程序前的联系人信息，另一种添加方式，填“fou”

填入联系人数量，例如“2”

回到显示菜单，选择8选项，查看联系人信息

4、查询联系人信息：

查询已保存的联系人信息，选择2选项，进行查找方式选择

选择(1)选项进行联系人查找

选择(2)选项进行学号查找

5、修改联系人信息：

选择(3)选项，输入联系人姓名，进入修改页面

选择修改类型，例如选择(3)，进行地址修改

在主菜单页面选择(8)选项检查联系人信息

6、删除联系人信息：

在主菜单页面选择(5)选项，输入联系人姓名，例如“r”

在主菜单选项，选择(8)选项检查联系人信息

7、退出系统：

在主菜单选项选择(0)选项，退出系统

代码部分：

该代码仅为个人大一课程设计。

#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include<conio.h>
struct BOOKS {char  id[20], tell[20], phone[20], name[20], add[20], email[30], wechat[20];
}books[20];      //创建结构体//函数模块的声明
void book_create();
void book_show(int);
void book_search();
void books_change();
void book_insert(int *);
void book_delete();
void book_outside();
void book_save(int*);
void book_reada(int*);
void book_readb();int main()
{int count = 0;int c;do{printf("\n");printf("\t\t\t\t*=================================*\n");printf("\t\t\t\t*                                 *\n");printf("\t\t\t\t*          欢迎使用通讯录！       *\n");printf("\t\t\t\t*                                 *\n");printf("\t\t\t\t*=================================*\n");printf("\n");printf("\n");printf("\t\t\t\t|==================================|\n");printf("\t\t\t\t|       1--创建通讯录              |\n");printf("\t\t\t\t|       2--查询联系人信息          |\n");printf("\t\t\t\t|       3--修改联系人信息          |\n");printf("\t\t\t\t|       4--添加联系人信息          |\n");printf("\t\t\t\t|       5--删除联系人信息          |\n");printf("\t\t\t\t|       6--保存联系人信息          |\n");printf("\t\t\t\t|       7--显示通讯录(未关闭程序)  |\n");printf("\t\t\t\t|       8--显示通讯录(再次运行程序)|\n");printf("\t\t\t\t|       0--退出                    |\n");printf("\t\t\t\t|==================================|\n");printf("\t\t\t\t         请输入你的选项：");scanf("%d", &c);switch (c){case 0:book_outside();                            //退出系统break;case 1:book_create();                            //调用创建运算break;case 2:book_search();                             //调用查询运算break;case 3:books_change();                            //调用修改运算break;case 4:book_insert(&count);                             //调用插入运算break;case 5:book_delete();                             //调用删除运算break;case 6:book_save(&count);                               //调用保存运算break;case 7:book_reada(&count);break;                                              //调用阅读运算case 8:book_readb();break;default:printf("\n\t\t\t\t无此选项！请重新选择！");}} while (c != 0);return 0;
}void book_create()     //创建模块
{int ban = 1;system("cls");if (ban != 0){printf("\n");printf("\n");printf("\n");printf("\t\t\t\t成功创建通讯录！请选择添加(4)选项！\n");ban = 1;}elseprintf("通讯录已创建，请勿重复创建！");
}void book_search()     //查找模块
{int i, number, flag = 1;char nam[20], ID[12];FILE*fp;system("cls");if ((fp = fopen("books.txt", "rb+")) == NULL){printf("cannot open file\n");exit(0);}for(i=0;i<20;i++)fread(&books[i],sizeof(struct BOOKS),1,fp);printf("\n\n\t\t\t\t按联系人查找（1）或按学号查找（2）：");scanf("%d", &number);printf("\n");if (number == 1){printf("\n\t\t\t\t请输入联系人姓名：");scanf("%s", &nam);for (i = 0; i < 20 && flag; i++){if ((strcmp(books[i].name, nam) == 0)){printf("\n\t\t\t\t姓名：%s\n", books[i].name);printf("\t\t\t\t学号：%s\n", books[i].id);printf("\t\t\t\t移动电话：%s\n", books[i].phone);printf("\t\t\t\t固定电话：%s\n", books[i].tell);printf("\t\t\t\t住址：%s\n", books[i].add);printf("\t\t\t\t邮箱：%s\n", books[i].email);printf("\t\t\t\t微信：%s\n", books[i].wechat);flag = 0;}}if(flag==1)printf("没有查询到！");}else{printf("\n\t\t\t\t请输入学号：");scanf("%s", &ID);for (i = 0; i < 20 && flag; i++){if ((strcmp(books[i].id, ID) == 0)){printf("\n\t\t\t\t学号：%s\n", books[i].id);printf("\t\t\t\t姓名：%s\n", books[i].name);printf("\t\t\t\t移动电话：%s\n", books[i].phone);printf("\t\t\t\t固定电话：%s\n", books[i].tell);printf("\t\t\t\t住址：%s\n", books[i].add);printf("\t\t\t\t邮箱：%s\n", books[i].email);printf("\t\t\t\t微信：%s\n", books[i].wechat);flag = 0;}}if(flag==1)printf("没有查询到！");    }fclose(fp);
}void books_change()        //修改模块
{int i,c,b,flag = 1;char nam[20];FILE*fp;FILE*fp2;b=i-4;system("cls");if ((fp = fopen("books.txt", "rb+")) == NULL){printf("\t\t\t\t不能打开文件！\n");return;}if ((fp2 = fopen("xiugai.txt", "wb+")) == NULL){printf("\t\t\t\t不能打开文件！\n");return;}printf("\n\n\t\t\t\t请输入要修改的姓名:");scanf("%s", &nam);   for (i = 0; i < 20; i++){ fread(&books[i],sizeof(struct BOOKS),1,fp);if (strcmp(books[i].name, nam) == 0){printf("\n\n\t\t\t\t|==================================|\n");printf("\t\t\t\t|       1--固定电话                |\n");printf("\t\t\t\t|       2--移动电话                |\n");printf("\t\t\t\t|       3--地址            |\n");printf("\t\t\t\t|       4--姓名                    |\n");printf("\t\t\t\t|       5--微信                    |\n");printf("\t\t\t\t|       6--邮箱                    |\n");printf("\t\t\t\t|       7--学号                    |\n");printf("\t\t\t\t|       0--返回                    |\n");printf("\t\t\t\t|==================================|\n");printf("\t\t\t\t请输入选项：");scanf("%d",&c);switch(c){case 0:break;case 1:printf("\n\t\t\t\t请输入修改后的固定电话：");scanf("%s", books[i].tell);break;case 2:printf("\n\t\t\t\t请输入修改后的移动电话：");scanf("%s", books[i].phone);break;case 3:printf("\n\t\t\t\t请输入修改后的地址：");scanf("%s", books[i].add);break;case 4:printf("\n\t\t\t\t请输入修改后的姓名：");scanf("%s", books[i].name);break;case 5:printf("\n\t\t\t\t请输入修改后的微信：");scanf("%s", books[i].wechat);break;case 6:printf("\n\t\t\t\t请输入修改后的邮箱：");scanf("%s", books[i].email);break;case 7:printf("\n\t\t\t\t请输入修改后的学号：");scanf("%s", books[i].id);break;default:printf("\n\t\t\t\t无此选项！请重新选择！");}//switch函数结束括号                       }//if函数结束括号if(fwrite(&books[i], sizeof(struct BOOKS), 1, fp2) != 1){printf("文件写入错误！");}    }                                //for循环结束括号printf("\n\n\t\t\t\t联系人信息修改成功！");  fclose(fp);fclose(fp2);remove("books.txt");rename("xiugai.txt","books.txt");
}void book_insert(int *count)     //添加模块
{int i,a,b;FILE *fp;char nam1[5] = "shi", nam2[5] = "fou", nam3[5],nam4[5];system("cls");   printf("\t\t\t\t是否为初次添加联系人？(是或否)：");scanf("%s",nam4);if((strcmp(nam1,nam4)==0)){   printf("\n\n\n\t\t\t\t保存需选择选项(6)保存!");for (i = *count; i < 20; i++){printf("\n\n\t\t\t\t请输入姓名：");scanf("%s", books[i].name);printf("\t\t\t\t请输入学号:");scanf("%s", books[i].id);printf("\t\t\t\t请输入移动电话：");scanf("%s", books[i].phone);printf("\t\t\t\t请输入固定电话：");scanf("%s", books[i].tell);printf("\t\t\t\t请输入地址：");scanf("%s", books[i].add);printf("\t\t\t\t请输入邮箱：");scanf("%s", books[i].email);printf("\t\t\t\t请输入微信：");scanf("%s", books[i].wechat);(*count)++;printf("\n\t\t\t\t是否继续添加？（是或否）：");scanf("%s", nam3);if ((strcmp(nam2, nam3) == 0))return;} }else{printf("\t\t\t\t已有联系人个数：");scanf("%d",&a);b=a+1;printf("\t\t\t\t请输入姓名：");scanf("%s", books[b].name);printf("\t\t\t\t请输入学号:");scanf("%s", books[b].id);printf("\t\t\t\t请输入移动电话：");scanf("%s", books[b].phone);printf("\t\t\t\t请输入固定电话：");scanf("%s", books[b].tell);printf("\t\t\t\t请输入地址：");scanf("%s", books[b].add);printf("\t\t\t\t请输入邮箱：");scanf("%s", books[b].email);printf("\t\t\t\t请输入微信：");scanf("%s", books[b].wechat);if ((fp = fopen("books.txt", "ab+")) == NULL){printf("不能打开文件！\n");return;}if (fwrite(&books[b], sizeof(struct BOOKS), 1, fp) != 1)printf("文件写入错误！");fclose(fp);printf("\n\n\t\t\t\t已自动保存！");return;}
}void book_delete(void)   //删除模块
{int i;char nam[20];FILE*fp;FILE*fp1;system("cls");printf("\t\t\t\t请输入要删除的联系人：");scanf("%s", &nam);if ((fp = fopen("books.txt", "rb+")) == NULL){printf("\t\t\t\t不能打开文件！");}if((fp1 = fopen("linshi.txt", "wb+"))==NULL){printf("\t\t\t\t不能打开文件！");                               } for(i=0;i<20;i++){   fread(&books[i], sizeof(struct BOOKS), 1, fp);if (strcmp(books[i].name, nam) !=0)                    {fwrite(&books[i], sizeof(struct BOOKS), 1, fp1);}}printf("\n\n\t\t\t\t联系人已删除！\n");fclose(fp);fclose(fp1);remove("books.txt");rename("linshi.txt","books.txt");}void book_outside()                    //退出模块
{system("cls");printf("\n");printf("\t\t\t\t*==============================*\n");printf("\t\t\t\t*                              *\n");printf("\t\t\t\t*          感谢使用            *\n");printf("\t\t\t\t*                              *\n");printf("\t\t\t\t*==============================*\n");printf("\t\t\t\t*                              *\n");printf("\t\t\t\t*         广东海洋大学         *\n");printf("\t\t\t\t*     物联网工程1191  黄伊权   *\n");printf("\t\t\t\t*                              *\n");printf("\t\t\t\t*==============================*\n");printf("\n");
}void book_save(int*count)             //保存模块
{system("cls");FILE *fp;int i;if ((fp = fopen("books.txt", "wb")) == NULL){printf("不能打开文件！\n");return;}for (i = 0; i <*count; i++)if (fwrite(&books[i], sizeof(struct BOOKS), 1, fp) != 1)printf("文件写入错误！");fclose(fp);printf("\n\n\t\t\t\t\t已保存！\n");
}void book_reada(int*count)                        //阅读模块1（初次启动程序）
{system("cls");FILE *fp;int i;if ((fp = fopen("books.txt", "rb")) == NULL){printf("不能打开文件！");exit(0);}fclose(fp);for (i = 0; i <*count; i++){fread(&books[i], sizeof(struct BOOKS), 1, fp);printf("\t\t\t\t姓名：%s\n", books[i].name);printf("\t\t\t\t学号：%s\n", books[i].id);printf("\t\t\t\t移动电话：%s\n", books[i].phone);printf("\t\t\t\t固定电话：%s\n", books[i].tell);printf("\t\t\t\t住址：%s\n", books[i].add);printf("\t\t\t\t邮箱：%s\n", books[i].email);printf("\t\t\t\t微信：%s\n", books[i].wechat);printf("\n");}}void book_readb(void)
{                                     //阅读模块2（再次启动程序）system("cls");FILE *fp;int i,a;if((fp=fopen("books.txt","rb"))==NULL){printf("不能打开文件！");exit(0);}printf("\n\n\t\t\t\t关闭程序前联系人数量：");scanf("%d",&a);if(a==0){printf("\n\t\t\t\t\t\t空！");}elseprintf("\n\t\t\t\t联系人信息如下：\n\n");for (i = 0; i <a; i++){fread(&books[i], sizeof(struct BOOKS), 1, fp);printf("\t\t\t\t姓名：%s\n", books[i].name);printf("\t\t\t\t学号：%s\n", books[i].id);printf("\t\t\t\t移动电话：%s\n", books[i].phone);printf("\t\t\t\t固定电话：%s\n", books[i].tell);printf("\t\t\t\t住址：%s\n", books[i].add);printf("\t\t\t\t邮箱：%s\n", books[i].email);printf("\t\t\t\t微信：%s\n", books[i].wechat);printf("\n");}fclose(fp);
}