请用c语言写一个通讯录

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define MAX_NAME_LEN 20
#define MAX_PHONE_LEN 11
#define MAX_EMAIL_LEN 30
#define MAX_CONTACTS 100

typedef struct {
char name[MAX_NAME_LEN];
char phone[MAX_PHONE_LEN];
char email[MAX_EMAIL_LEN];
} Contact;

Contact contacts[MAX_CONTACTS];
int numContacts = ;

void addContact() {
if (numContacts >= MAX_CONTACTS) {
printf("通讯录已满，无法添加新联系人！\n");
return;
}
Contact newContact;
printf("请输入联系人姓名：");
scanf("%s", newContact.name);
printf("请输入联系人电话：");
scanf("%s", newContact.phone);
printf("请输入联系人邮箱：");
scanf("%s", newContact.email);
contacts[numContacts++] = newContact;
printf("联系人已添加成功！\n");
}

void searchContact() {
char name[MAX_NAME_LEN];
printf("请输入要查找的联系人姓名：");
scanf("%s", name);
for (int i = ; i < numContacts; i++) {
if (strcmp(name, contacts[i].name) == ) {
printf("联系人姓名：%s\n", contacts[i].name);
printf("联系人电话：%s\n", contacts[i].phone);
printf("联系人邮箱：%s\n", contacts[i].email);
return;
}
}
printf("未找到该联系人！\n");
}

void listContacts() {
printf("通讯录中共有 %d 个联系人：\n", numContacts);
for (int i = ; i < numContacts; i++) {
printf("%d. 姓名：%s，电话：%s，邮箱：%s\n", i + 1, contacts[i].name, contacts[i].phone, contacts[i].email);
}
}

void deleteContact() {
char name[MAX_NAME_LEN];
printf("请输入要删除的联系人姓名：");
scanf("%s", name);
for (int i = ; i < numContacts; i++) {
if (strcmp(name, contacts[i].name) == ) {
for (int j = i; j < numContacts - 1; j++) {
contacts[j] = contacts[j + 1];
}
numContacts--;
printf("联系人已删除成功！\n");
return;
}
}
printf("未找到该联系人！\n");
}

int main() {
int choice;
while (1) {
printf("请选择要进行的操作：\n");
printf("1. 添加联系人\n");
printf("2. 查找联系人\n");
printf("3. 列出所有联系人\n");
printf("4. 删除联系人\n");
printf("5. 退出程序\n");
printf("请输入操作编号：");
scanf("%d", &choice);
switch (choice) {
case 1:
addContact();
break;
case 2:
searchContact();
break;
case 3:
listContacts();
break;
case 4:
deleteContact();
break;
case 5:
printf("感谢使用通讯录程序，再见！\n");
exit();
default:
printf("无效的操作编号，请重新输入！\n");
}
}
return ;
}