昨天仅仅写了个只能实现添加好友的，今天把剩下的列举好友、搜索好友和删除好友全都加进来了。但仅仅是个初版，界面还是需要调整好的。
#include <stdio.h> #include <stdlib.h> #define OK 0 #define ERROR -1 #define MALLOC_ERROR -2 typedef struct friend { int id; //结点数据 char name[20]; char phone[20]; char addr[20]; char company_phone[20]; struct friend *next; //结点指针 }Friend; typedef Friend *PFriend; //重命名结点指针类型 //添加好友（尾插法） int Add_Friend(PFriend s,int id) { if (s == NULL) { return ERROR; } //要插入的朋友信息 PFriend friend = (PFriend)malloc(sizeof(Friend)/sizeof(char)); if (friend == NULL) { return MALLOC_ERROR; } friend->id = id; printf ("\n\tput your name:"); scanf ("%s",friend->name); printf ("\n\tput your phone:"); scanf ("%s",friend->phone); printf ("\n\tput your addr:"); scanf ("%s",friend->addr); printf ("\n\tput your company_phone:"); scanf ("%s",friend->company_phone); friend->next = NULL; //找最后一个结点 PFriend temp = s; while (temp->next) { temp = temp->next; } temp->next = friend; return OK; } //列举好友 int List_Friend(PFriend s) { if (s == NULL) { return ERROR; } PFriend temp = s->next; if (temp == NULL) { printf ("\n\n\n"); printf ("暂无好友信息，请先添加好友！\n\n\n"); } while (temp) { printf ("\n\tid:%d,name:%s,phone:%s,addr:%s,company_phone:%s\n",temp->id,temp->name,temp->phone,temp->addr,temp->company_phone); temp = temp->next; } return OK; } //搜索好友 int Search_Friend(PFriend friend,char *name) { PFriend s = friend; PFriend temp = NULL; if (s == NULL) { system("clear"); printf ("\n\n\n"); printf ("\n\t暂无此好友，请重新输入！\n\n\n"); } while (s != NULL && (s->next) != NULL) { temp = s->next; if (temp == NULL && strcmp(temp->name,name) != 0) { system("clear"); printf ("\n\n\n"); printf ("\n\t经查询无此好友，请重新输入！\n\n\n"); } else if (temp != NULL && strcmp(temp->name,name) == 0) { system("clear"); printf ("\n\n\n"); printf ("\tid:%d\n",temp->id); printf ("\tname:%s\n",temp->name); printf ("\tphone:%s\n",temp->phone); printf ("\taddr:%s\n",temp->addr); printf ("\tcompany_phone:%s\n",temp->company_phone); printf ("\n\n\n"); } s = s->next; } } //删除好友 int Delete_Friend(PFriend friend,char *name) { PFriend s = friend; PFriend temp = NULL; while (s != NULL && (s->next) != NULL) { temp = s->next; if (temp == NULL && strcmp(temp->next,name) != 0) { system("clear"); printf ("\n\n\n"); printf ("\n\t该无该好友，无法删除，请重新输入!\n\n\n"); } else if (temp != NULL && strcmp(temp->name,name) == 0) { s->next = temp->next; free(temp); system("clear"); printf ("\n\n\n"); printf ("\n\t成功删除该好友！\n\n\n"); } s = s->next; } return OK; } //界面显示 void interface() { printf ("1) 添加好友\n"); printf ("2) 列举好友\n"); printf ("3) 搜索好友\n"); printf ("4) 删除好友\n"); printf ("请选择:"); } int main() { int id = 0; PFriend head_node = (PFriend)malloc(sizeof(Friend)/sizeof(char)); if (head_node == NULL) { return MALLOC_ERROR; } head_node->next == NULL; //选择 char choice[2]; system("clear"); //清屏 while(1) { interface(); scanf ("%s",choice); //字符串以"\n"结尾 switch(choice[0]) { case '1'://添加好友 { id++; if (Add_Friend(head_node,id) != OK) { return ERROR; system("clear"); printf ("\n\n\n"); printf ("\t添加好友失败，请重新添加！"); } system("clear"); printf ("\n\n\n"); printf ("\t添加好友成功！\n"); break; } case'2'://列举好友 { system("clear"); printf ("\n\n\n"); List_Friend(head_node); break; } case'3'://搜索好友 { char name[20]; system("clear"); printf ("\n\n\n"); printf ("\n\t请输入要搜索的好友姓名："); scanf ("%s",name); Search_Friend(head_node,name); break; } case'4'://删除好友 { char name[20]; system("clear"); printf ("\n\n\n"); printf ("\n\t请输入要删除的好友姓名："); scanf ("%s",name); Delete_Friend(head_node,name); break; } default: { system("clear"); printf ("\n\n\n"); printf ("请输入正确的选项！\n\n\n"); break; } } } system("claer"); return 0; }
