c语言通讯录代码

下面是一份简单的 C 语言通讯录代码，使用结构体实现：

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

#define MAX_CONTACTS 100

struct Contact {
    char name[50];
    char email[50];
    char phone[15];
};

int main() {
    struct Contact contacts[MAX_CONTACTS];
    int num_contacts = 0;

    while (1) {
        printf("\nMenu:\n");
        printf("1. Add contact\n");
        printf("2. List contacts\n");
        printf("3. Search contact\n");
        printf("4. Exit\n");

        int choice;
        printf("\nEnter your choice: ");
        scanf("%d", &choice);

        switch (choice) {
            case 1: {
                if (num_contacts >= MAX_CONTACTS) {
                    printf("Error: Maximum contacts reached.\n");
                    break;
                }

                struct Contact new_contact;
                printf("\nEnter name: ");
                scanf("%s", new_contact.name);
                printf("Enter email: ");
                scanf("%s", new_contact.email);
                printf("Enter phone: ");
                scanf("%s", new_contact.phone);

                contacts[num_contacts] = new_contact;
                num_contacts++;

                printf("\nContact added successfully.\n");
                break;
            }
            case 2: {
                if (num_contacts == 0) {
                    printf("No contacts found.\n");
                    break;
                }

                printf("\nContacts:\n");
                for (int i = 0; i < num_contacts; i++) {
                    printf("%d. Name: %s\n", i + 1, contacts[i].name);
                    printf("   Email: %s\n", contacts[i].email);
                    printf("   Phone: %s\n", contacts[i].phone);
                }
                break;
            }
            case 3: {
                if (num_contacts == 0) {
                    printf("No contacts found.\n");
                    break;
                }

                char search_name[50];
                printf("\nEnter name to search for: ");
                scanf("%s", search_name);

                int found = 0;
                for (int i = 0; i < num_contacts; i++) {
                    if (strcmp(contacts[i].name, search_name) == 0) {
                        printf("\nContact found:\n");
                        printf("Name: %s\n", contacts[i].name);
                        printf("Email: %s\n", contacts[i].email);
                        printf("Phone: %s\n", contacts[i].phone);
                        found = 1;
                        break;
                    }
                }

                if (!found) {
                    printf("\nContact not found.\n");
                }
                break;
            }
            case 4: {
                printf("\nExiting program.\n");
                return 0;
            }
            default: {
                printf("\nInvalid choice. Try again.\n");
                break;
            }
        }
    }
}

该代码定义了一个 `Contact` 结构体，包含联系人的姓名、电子邮件和电话号码。使用一个数组来存储多个联系人，最大数量为 `MAX_CONTACTS`。`main` 函数中使用一个无限循环来提示用户选择菜单选项。根据用户选择的选项，执行不同的操作：添加联系人，列出联系人列表，搜索联系人或退出程序。