学生通讯录管理系统

学生通讯录管理系统

#include <stdio.h>
#include <string.h>
#define MAX_CONTACTS 100
typedef struct {
    char name[50];
    char phone[20];
    char email[50];
} Contact;
int numContacts = 0;
Contact contacts[MAX_CONTACTS];
void addContact() {
    if (numContacts == MAX_CONTACTS) {
        printf("通讯录已满，无法添加新的联系人。\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("联系人添加成功。\n");
}

void searchContact() {
    char keyword[50];
    printf("请输入要查询的关键字：");
    scanf("%s", keyword);
    printf("查询结果：\n");
    for (int i = 0; i < numContacts; i++) {
        if (strstr(contacts[i].name, keyword) || strstr(contacts[i].phone, keyword) || strstr(contacts[i].email, keyword)) {
            printf("姓名：%s\n", contacts[i].name);
            printf("电话：%s\n", contacts[i].phone);
            printf("邮箱：%s\n", contacts[i].email);
            printf("\n");
        }
    }
}

void deleteContact() {
    char name[50];
    printf("请输入要删除的联系人姓名：");
    scanf("%s", name);
    int index = -1;
    for (int i = 0; i < numContacts; i++) {
        if (strcmp(contacts[i].name, name) == 0) {
            index = i;
            break;
        }
    }
    if (index == -1) {
        printf("未找到该联系人。\n");
    }
    else {
        for (int i = index; i < numContacts - 1; i++)
            contacts[i] = contacts[i + 1];
        
        numContacts--;
        printf("联系人删除成功。\n");
    }
}

void listContacts() {
    printf("所有联系人：\n");

    for (int i = 0; i < numContacts; i++) {
        printf("姓名：%s\n", contacts[i].name);
        printf("电话：%s\n", contacts[i].phone);
        printf("邮箱：%s\n", contacts[i].email);
        printf("\n");
    }
}

int main() {
    int choice;
    do {
        printf("学生通讯录管理系统\n");
        printf("1. 添加联系人\n");
        printf("2. 查询联系人\n");
        printf("3. 删除联系人\n");
        printf("4. 显示所有联系人\n");
        printf("5. 退出系统\n");
        printf("请选择操作：");
        scanf("%d", &choice);

        switch (choice) {
        case 1:
            addContact();
            break;
        case 2:
            searchContact();
            break;
        case 3:
            deleteContact();
            break;
        case 4:
            listContacts();
            break;
        case 5:
            printf("退出系统。\n");
            break;
        default:
            printf("无效的选择。\n");
            break;
        }
        printf("\n");
    } while (choice != 5);

    return 0;
}