功能需求
设计“通讯录管理系统”使其具有数据插入、修改、删除、显示和查询等功能。需求如下:
(1)数据包括人名、工作单位、电话号码和E-mail地址
(2)可对记录中的姓名和电话号码进行修改
(3)可增加或删除记录
(4)可显示所有保存的记录
(5)可按人名或电话号码进行查询
//开发工具:EditPlus 编译工具:MinGW 原文件编码:GBK
#include <stdio.h>
#include <string.h>
#define CONTACTCOUNT 100 //通讯录可存联系人最大数
struct Contact {
char name[30]; //人名
char workUnit[120]; //工作单位
char phoneNumber[20]; //电话号码
char email[50]; //E-mail地址
};
static struct Contact contacts[CONTACTCOUNT]; //通讯录本体
//函数申明
void safe_flush(FILE *);
void addContact();
void findContact();
void showAllContact();
void delAllContact();
void save2File();
void read4File();
int main(int argc, char * argv[]) {
printf("********************************************************\n");
printf("=============== 欢迎使用 通讯录管理系统 ================\n");
printf("********************************************************\n");
read4File();
int index, r;
while (1) {
printf("\n请选择您要操作的功能?\n");
printf("1、添加联系人\n");
printf("2、查找联系人\n");
printf("3、查看所有联系人\n");
printf("4、删除所有联系人\n");
printf("5、保存到文件\n");
printf("6、退出系统\n");
printf("\n输入序号回车即可:\n");
r = scanf("%d", &index);
safe_flush(stdin);
if (r == 0) {
printf("请输入正确的功能序号!\n\n");
continue;
}
switch (index) {
case 1:
addContact();
break;
case 2:
findContact();
break;
case 3:
showAllContact();
break;
case 4:
delAllContact();
break;
case 5:
save2File();
break;
case 6:
goto exit;
break;
default:
printf("请输入正确的功能序号!\n\n\n");
break;
}
}
exit: printf("\n谢谢您的使用,再见!\n\n");
return 0;
}
//添加联系人
void addContact() {
int ic = 0;
for (; ic < CONTACTCOUNT; ic++) {
struct Contact contact = contacts[ic];
int len = strlen(contact.name);
if (len == 0)
break;
}
printf("请输入姓名:");
gets(contacts[ic].name);
printf("请输入工作单位:");
gets(contacts[ic].workUnit);
printf("请输入电话号码:");
gets(contacts[ic].phoneNumber);
printf("请输入E-mail地址:");
gets(contacts[ic].email);
}
//按条件查找联系人
void findContact() {
printf("按以下方式查找联系人:\n");
printf("1、按姓名查找\n");
printf("2、按电话号码查找\n\n");
printf("输入序号回车即可\n");
int index, r;
r = scanf("%d", &index);
safe_flush(stdin);
if (r == 0 || (index != 1 && index != 2)) {
printf("请输入正确的查找功能序号!\n\n");
return;
}
printf("请输入查询关键字:\n");
char fname[30];
gets(fname);
int ct = 0;
printf("========================================\n");
int oindex = -1;
for (int i = 0; i < CONTACTCOUNT; i++) {
struct Contact contact = contacts[i];
int len = strlen(contact.name);
if (len == 0)
continue;
char * str;
char * ret;
if (index == 1) {
str = contact.name;
ret = strstr(str, fname);
} else if (index == 2) {
str = contact.phoneNumber;
ret = strstr(str, fname);
}
if (ret != NULL) {
printf("姓名:%s\n", contact.name);
printf("工作单位:%s\n", contact.workUnit);
printf("电话号码:%s\n", contact.phoneNumber);
printf("E-mail地址:%s\n\n", contact.email);
ct++;
oindex = i;
}
}
if (ct == 0) {
printf("通讯录不存在此联系人!!!\n");
}
printf("============查找联系人已显示============\n\n");
if (ct == 1) {
printf("对此联系人可进行如下操作:\n");
printf("1、编辑此联系人\n");
printf("2、删除此联系人\n");
printf("3、无其他操作\n\n");
printf("输入序号回车即可:\n");
r = scanf("%d", &index);
safe_flush(stdin);
if (r == 0 || (index != 1 && index != 2 && index != 3)) {
printf("您输入的操作序号不正确!\n\n");
return;
}
if (index == 3) {
return;
}
if (index == 1) { //编辑
printf("请输入新的姓名,为空则不改变:\n");
char name[30];
gets(name);
int len = strlen(name);
if (len > 0)
strcpy(contacts[oindex].name, name);
printf("请输入新的工作单位,为空则不改变:\n");
char workUnit[120];
gets(workUnit);
len = strlen(workUnit);
if (len > 0)
strcpy(contacts[oindex].workUnit, workUnit);
printf("请输入新的电话号码,为空则不改变:\n");
char phoneNumber[20];
gets(phoneNumber);
len = strlen(phoneNumber);
if (len > 0)
strcpy(contacts[oindex].phoneNumber, phoneNumber);
printf("请输入新的E-mail地址,为空则不改变:\n");
char email[50];
gets(email);
len = strlen(email);
if (len > 0)
strcpy(contacts[oindex].email, email);
} else if (index == 2) { //删除
struct Contact contact;
contacts[oindex] = contact;
}
} else if (ct > 1) {
printf("******请详细查询条件,查询到单条信息才可以(编辑、删除)******\n\n");
}
}
//显示所有联系人
void showAllContact() {
printf("========================================\n");
for (int i = 0; i < CONTACTCOUNT; i++) {
struct Contact contact = contacts[i];
int len = strlen(contact.name);
if (len == 0)
continue;
printf("姓名:%s\n", contact.name);
printf("工作单位:%s\n", contact.workUnit);
printf("电话号码:%s\n", contact.phoneNumber);
printf("E-mail地址:%s\n\n", contact.email);
}
printf("============全部联系人已显示============\n");
}
//删除所有联系人
void delAllContact() {
printf("******您确定删除所有联系人吗?(y/n)******\n");
char yn;
scanf("%s", &yn);
if (yn == 'y') {
memset(&contacts, 0, sizeof(contacts));
remove("contacts.csv");
printf("删除所有联系人 完毕\n");
}
}
//保存联系人到文件
void save2File() {
FILE * fp = fopen("contacts.csv", "w+");
for (int i = 0; i < CONTACTCOUNT; i++) {
struct Contact contact = contacts[i];
int len = strlen(contact.name);
if (len == 0)
continue;
char tstr[220];
memset(tstr, 0, sizeof(tstr));
strcat(tstr, contact.name);
strcat(tstr, ",");
strcat(tstr, contact.workUnit);
strcat(tstr, ",");
strcat(tstr, contact.phoneNumber);
strcat(tstr, ",");
strcat(tstr, contact.email);
fputs(tstr, fp);
fputs("\n", fp);
}
fclose(fp);
if (fp != NULL) {
printf("!!!保存到文件成功!!!\n");
}
}
//从文件读取联系人
void read4File() {
FILE * fp = fopen("contacts.csv", "r");
if (fp == NULL)
return;
char buff[220];
int i = 0;
while (fgets(buff, 220, fp)) {
int len = strlen(buff);
if (len == 0)
continue;
char ptr[strlen(buff) + 1];
int i, j = 0;
for (i = 0; buff[i] != '\0'; i++) {
if (buff[i] != '\t' && buff[i] != '\n')
ptr[j++] = buff[i];
}
ptr[j] = '\0';
const char s[2] = ",";
char * token;
token = strtok(ptr, s);
len = strlen(token);
if (len == 0)
continue;
strcpy(contacts[i].name, token);
token = strtok(NULL, s);
strcpy(contacts[i].workUnit, token);
token = strtok(NULL, s);
strcpy(contacts[i].phoneNumber, token);
token = strtok(NULL, s);
strcpy(contacts[i].email, token);
i++;
}
fclose(fp);
}
//清空输入流缓存
void safe_flush(FILE * fp) {
int ch;
while ((ch = fgetc(fp)) != EOF && ch != '\n');
}