使用C语言以及数据结构知识采用线性链表方式编写简单的c程序管理通讯录。通过键入数字选择增加、删除、修改联系人信息等功能。

在C语言中，我们可以使用结构体表示联系人，并通过链表的数据结构存储和管理联系人的列表。下面是一个简化的示例，展示如何创建一个基本的通讯录程序：

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

// 定义联系人结构体
typedef struct {
    char name[50];
    char phone[20];
} Contact;

// 链表节点结构体
typedef struct Node {
    Contact info;
    struct Node* next;
} Node;

// 初始化链表头指针
Node* head = NULL;

// 添加联系人
void addContact(char* name, char* phone) {
    Node* newNode = (Node*)malloc(sizeof(Node));
    newNode->info.name = malloc(strlen(name) + 1);
    strcpy(newNode->info.name, name);
    newNode->info.phone = malloc(strlen(phone) + 1);
    strcpy(newNode->info.phone, phone);
    newNode->next = head;
    head = newNode;
}

// 删除联系人
void deleteContact(int id) {
    if (head == NULL) return;
    if (head->info.id == id) {
        Node* temp = head;
        head = head->next;
        free(temp);
        return;
    }
    Node* current = head;
    while (current->next != NULL && strcmp(current->next->info.id, id)) {
        current = current->next;
    }
    if (current->next != NULL) {
        Node* temp = current->next;
        current->next = temp->next;
        free(temp);
    }
}

// 修改联系人信息
void modifyContact(int id, char* newName, char* newPhone) {
    Node* current = head;
    while (current != NULL && strcmp(current->info.id, id) != 0) {
        current = current->next;
    }
    if (current != NULL) {
        free(current->info.name);
        free(current->info.phone);
        current->info.name = malloc(strlen(newName) + 1);
        strcpy(current->info.name, newName);
        current->info.phone = malloc(strlen(newPhone) + 1);
        strcpy(current->info.phone, newPhone);
    } else {
        printf("Contact not found.\n");
    }
}

// 主函数
int main() {
    int choice, id;
    char name[50], phone[20];

    // 打印菜单并获取用户选择
    do {
        printf("\n1. Add contact\n2. Delete contact\n3. Modify contact\n4. Exit\n");
        scanf("%d", &choice);

        switch(choice) {
            case 1:
                printf("Enter contact details (ID, Name, Phone): ");
                scanf("%d %s %s", &id, name, phone);
                addContact(name, phone);
                break;
            case 2:
                printf("Enter ID to delete: ");
                scanf("%d", &id);
                deleteContact(id);
                break;
            case 3:
                printf("Enter ID and updated details (newName, newPhone): ");
                scanf("%d %s %s", &id, name, phone);
                modifyContact(id, name, phone);
                break;
            case 4:
                break;
            default:
                printf("Invalid choice. Try again.\n");
                break;
        }
    } while (choice != 4);

    return 0;
}