用C++语言帮我写一个利用线性表实现通讯录管理

程序。

好的，以下是利用线性表实现通讯录管理程序的C语言代码：

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

#define MAX_NAME_LEN 20
#define MAX_PHONE_LEN 11

typedef struct contact {
    char name[MAX_NAME_LEN];
    char phone[MAX_PHONE_LEN];
    struct contact *next;
} Contact;

// 初始化通讯录为空
Contact *init_contact() {
    Contact *head = (Contact*) malloc(sizeof(Contact));
    head->next = NULL;
    return head;
}

// 添加联系人到通讯录
void add_contact(Contact *head, char *name, char *phone) {
    Contact *new_contact = (Contact*) malloc(sizeof(Contact));
    strcpy(new_contact->name, name);
    strcpy(new_contact->phone, phone);
    new_contact->next = head->next;
    head->next = new_contact;
    printf("Contact added successfully.\n");
}

// 查找指定联系人
void search_contact(Contact *head, char *name) {
    Contact *cur_contact = head->next;
    int flag = 0;
    while (cur_contact != NULL) {
        if (strcmp(cur_contact->name, name) == 0) {
            printf("Name: %s, Phone: %s\n", cur_contact->name, cur_contact->phone);
            flag = 1;
            break;
        }
        cur_contact = cur_contact->next;
    }
    if (!flag) {
        printf("Contact not found.\n");
    }
}

// 修改指定联系人的电话号码
void modify_contact(Contact *head, char *name, char *new_phone) {
    Contact *cur_contact = head->next;
    int flag = 0;
    while (cur_contact != NULL) {
        if (strcmp(cur_contact->name, name) == 0) {
            strcpy(cur_contact->phone, new_phone);
            printf("Phone number modified successfully.\n");
            flag = 1;
            break;
        }
        cur_contact = cur_contact->next;
    }
    if (!flag) {
        printf("Contact not found.\n");
    }
}

// 删除指定联系人
void delete_contact(Contact *head, char *name) {
    Contact *cur_contact = head->next;
    Contact *pre_contact = head;
    int flag = 0;
    while (cur_contact != NULL) {
        if (strcmp(cur_contact->name, name) == 0) {
            pre_contact->next = cur_contact->next;
            free(cur_contact);
            printf("Contact deleted successfully.\n");
            flag = 1;
            break;
        }
        pre_contact = cur_contact;
        cur_contact = cur_contact->next;
    }
    if (!flag) {
        printf("Contact not found.\n");
    }
}

// 输出通讯录中的所有联系人
void print_contact(Contact *head) {
    Contact *cur_contact = head->next;
    if (cur_contact == NULL) {
        printf("Contact list is empty.\n");
    } else {
        printf("Name\tPhone\n");
        while (cur_contact != NULL) {
            printf("%s\t%s\n", cur_contact->name, cur_contact->phone);
            cur_contact = cur_contact->next;
        }
    }
}

int main() {
    Contact *head = init_contact();
    int choice;
    char name[MAX_NAME_LEN];
    char phone[MAX_PHONE_LEN];
    char new_phone[MAX_PHONE_LEN];

    while (1) {
        printf("\n-- Contact Management System --\n");
        printf("[1] Add contact\n");
        printf("[2] Search contact\n");
        printf("[3] Modify phone number\n");
        printf("[4] Delete contact\n");
        printf("[5] Print contact list\n");
        printf("[0] Exit\n");
        printf("Enter your choice: ");
        scanf("%d", &choice);

        switch (choice) {
            case 1: // 添加联系人
                printf("Enter name: ");
                scanf("%s", name);
                printf("Enter phone number: ");
                scanf("%s", phone);
                add_contact(head, name, phone);
                break;
            case 2: // 查找联系人
                printf("Enter name: ");
                scanf("%s", name);
                search_contact(head, name);
                break;
            case 3: // 修改电话号码
                printf("Enter name: ");
                scanf("%s", name);
                printf("Enter new phone number: ");
                scanf("%s", new_phone);
                modify_contact(head, name, new_phone);
                break;
            case 4: // 删除联系人
                printf("Enter name: ");
                scanf("%s", name);
                delete_contact(head, name);
                break;
            case 5: // 输出所有联系人
                print_contact(head);
                break;
            case 0: // 退出程序
                printf("Exiting Contact Management System.\n");
                exit(0);
            default:
                printf("Invalid choice, please try again.\n");
                break;
        }
    }
    return 0;
}

这是一个基于命令行界面的通讯录管理程序，支持添加、查找、修改、删除联系人，并且可以输出整个通讯录中的所有联系人。通过链表来实现联系人的添加、删除等操作，程序运行效率较高，并且可以处理较大量级的通讯录数据。