通讯录程序（链表版）

#include <stdio.h>#include <stdlib.h>#include <string.h>#define N 1024struct node{int num ;char name[N];char telephone[N];char address[N];struct node * next;};typedef struct node Node;typedef struct node * Link;void creat_empty_link(Link *head){*head = (Link)malloc(sizeof(Node));(*head)->next = NULL;}void insert_node(Link *head,Link new_node){Link temp = *head;new_node = (Link)malloc(sizeof(Node));if(new_node == NULL){printf("malloc error!\n");exit(-1);}printf("请输入联系人姓名:");scanf("%s",new_node->name);printf("请输入联系人号码:");scanf("%s",new_node->telephone);printf("请输入联系人住址:");scanf("%s",new_node->address);if((*head)->next == NULL){(*head)->next = new_node;new_node->next = NULL;return;}while(temp->next != NULL){temp = temp->next;(new_node->num)++;}temp->next = new_node;new_node->next = NULL;}void del_node(Link *head){char name[N];Link temp;Link p;temp = *head;p = temp;temp = temp->next;scanf("%s",name);while(temp != NULL){if((strcmp((temp->name),name)) == 0){p->next = temp->next;free(temp);printf("删除成功!\n");break;}else{p = temp;temp = temp->next;}}if(temp == NULL){printf("无该联系人!\n");return;}}void display_node(Link * head){Link temp;temp = (*head)->next;if((*head)->next == NULL){printf("还未添加联系人!\n");return ;}printf("序号       姓名       联系方式        家庭住址\n");while(temp != NULL){printf("%4d  %5s  %15s   %15s\n",temp->num,temp->name,temp->telephone,temp->address);temp = temp->next;}printf("\n");}void search(Link *head,char name[]){Link temp;temp = *head;while(temp != NULL){if((strcmp((temp->name),name)) == 0){printf("序号      姓名      联系方式        家庭住址\n");printf("%4d    %5s    %15s     %15s\n",temp->num,temp->name,temp->telephone,temp->address);break;}else{temp = temp->next;}}if(temp == NULL){printf("查无此人!\n");return;}}void menu(){printf("＊＊＊＊＊＊＊欢迎使用通讯录＊＊＊＊＊＊＊\n");printf("＊                                      ＊\n");printf("＊1.          添加联系人信息            ＊\n");printf("＊2.          显示联系人信息            ＊\n");printf("＊3.          删除联系人信息            ＊\n");printf("＊4.          修改联系人信息            ＊\n");printf("＊5.          查找联系人信息            ＊\n");printf("＊6.            退出通讯录              ＊\n");printf("＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊\n");printf("请选择您需要的操作(1~6):");}void change(Link *head,Link new_node){Link temp;temp = *head;int i;char name[N];char telephone[N];char address[N];printf("请输入您需要修改的联系人姓名:");scanf("%s",name);while(temp != NULL){if((strcmp((temp->name),name)) == 0){printf("请选择要修改的选项:\n");printf("1.姓名\n");printf("2.联系方式\n");printf("3.家庭住址\n");scanf("%d",&i);switch(i){case 1:{printf("请输入新的姓名:");scanf("%s",name);strcpy((temp->name),name);}break;case 2:{printf("请输入新的联系方式:");scanf("%s",telephone); strcpy((temp->telephone),telephone);} break;case 3:{  printf("请输入新的家庭住址:");scanf("%s",address);strcpy((temp->address),address);}printf("修改成功!\n");break;default:printf("输入有误!\n");}break;}elsetemp = temp->next;}if(temp == NULL){printf("无该联系人!\n");}}int choose(Link *head,Link new_node){Link temp;int n;int data;int choice;char name[N];temp = *head;scanf("%d",&n);switch(n){case 1: {    insert_node(head,new_node);printf("添加成功!\n");for(data = 0;;data++){printf("是否继续添加?(1/0):");scanf("%d",&choice);if(choice == 1){insert_node(head ,new_node);printf("添加成功!\n");}else {system("clear");menu();choose(head,new_node);break;}}}   break;case 2:   {display_node(head);printf("\n");printf("请选择您接下来的操作:");choose(head,new_node);   }   break;case 3:   {   if((*head)->next == NULL)   {printf("无联系人可删除,请先添加!\n");system("clear");menu(); choose(head,new_node);   }   else   { printf("请输入需要删除的联系人姓名:");del_node(head);printf("\n");printf("请选择您接下来的操作:");choose(head,new_node);   }    }   break;case 4:   {if((*head)->next ==  NULL){printf("无联系人可修改,请先添加!\n");system("clear");menu();}else{change(head,new_node);printf("\n");printf("请选择接下来的操作:");choose(head,new_node);}   }   break;case 5:   {if((*head)->next == NULL) {printf("无联系人可查找，请先添加!\n");printf("\n");  printf("请选择您接下来的操作:");choose(head,new_node);return;}printf("请输入要查找的联系人姓名:");scanf("%s",name);search(head,name);printf("\n");printf("请选择接下来的操作:");choose(head,new_node);   }case 6:   {   system("clear");    printf("＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊\n");   printf("＊                                      ＊\n");   printf("＊            谢谢使用通讯录            ＊\n");   printf("＊                                      ＊\n");   printf("＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊\n");   }   break;default:   {printf("输入有误,请重新输入!\n");choose(head,new_node);   }   break;}}int main(){Link head = NULL;Link new_node = NULL;system("clear");menu();creat_empty_link(&head);choose(&head,new_node);return 0;}