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untitled1.cpp

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+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+//定义商品类型
+typedef struct goods{
+	int id;
+	char name[20];
+	int classification;
+	float price;
+	struct goods *next;
+}Goods;
+
+//创建带头结点的商品信息单链表
+Goods *createList(){
+	Goods *head = (Goods*)malloc(sizeof(Goods));
+	head->next = NULL;
+	return head;
+}
+
+//输入一个商品
+void inputWorker(Goods *goods){
+	printf("请输入商品代码：");
+	scanf("%d",&goods->id);
+	printf("请输入名称：");
+	scanf("%s",goods->name);
+	printf("请输入分类：");
+	scanf("%d",&goods->classification);
+	printf("请输入单价：");
+	scanf("%f",&goods->price);
+}
+
+//显示所有商品
+void displayAll(Goods *head){
+	if(head->next == NULL){
+		printf("列表为空！\n");
+		return;
+	}
+	Goods *p = head->next;
+	printf("商品代码\t名称\t分类\t单价\n");
+	while(p != NULL){
+	printf("%d\t         %s\t %d\t%.2f\n",p->id,p->name,p->classification,p->price);
+		p = p->next;
+	}
+}
+
+//按照商品代码、商品名称和商品单价对所有商品进行递增排序
+void sort(Goods *head){
+	Goods *p,*q,*tail;
+	tail = NULL;
+	while(head->next != tail){
+		p = head;
+		q = p->next;
+		while(q->next != tail){
+			if(q->id > q->next->id){
+				p->next = q->next;
+				q->next = q->next->next;
+				p->next->next = q;
+				q = p->next;
+			}
+			p = p->next;
+			q = q->next;
+		}
+		tail = q;
+	}
+}
+
+//删除指定商品代码的记录
+void deleteWorker(Goods *head,int id){
+	Goods *p = head->next, *pre = head;
+	while(p != NULL){
+		if(p->id == id){
+			pre->next = p->next;
+			free(p);
+			printf("删除成功！\n");
+			return;
+		}
+		pre = p;
+		p = p->next;
+	}
+	printf("未找到该商品代码！\n");
+}
+
+//查找指定商品代码的记录
+void searchWorker(Goods *head,int id){
+	Goods *p = head->next;
+	while(p != NULL){
+		if(p->id == id){
+			printf("商品代码\t名称\t分类\t单价\n");
+			printf("%d\t         %s\t %d\t%.2f\n",p->id,p->name,p->classification,p->price); 
+			return;
+		}
+		p = p->next;
+	}
+	printf("未找到该商品代码！\n");
+}
+
+//统计指定商品分类的商品数
+void countWorker(Goods *head,int classification){
+	int count = 0;
+	Goods *p = head->next;
+	while(p != NULL){
+		if(p->classification == classification){
+			count++;
+		}
+		p = p->next;
+	}
+	printf("分类%d共有%d种商品\n",classification,count);
+}
+
+int main(){
+	Goods *head = createList();
+	int choice = 0, id, classification;
+	while(1){
+		printf("分类：1:服装 2.数码产品 3.护肤产品 4.食品 5.图书\n");
+		printf("******************\n");
+		printf("1.输入一个商品\n");
+		printf("2.显示所有商品\n");
+		printf("3.递增排序\n");
+		printf("4.删除指定商品代码的商品\n");
+		printf("5.查找指定商品代码的商品\n");
+		printf("6.统计指定分类的商品数量\n");
+		printf("0.退出系统\n");
+		printf("******************\n");
+		printf("请选择：");
+		scanf("%d",&choice);
+		switch(choice){
+		case 0:
+			printf("感谢使用！\n");
+			return 0;
+		case 1:
+			{
+				Goods *goods = (Goods*)malloc(sizeof(Goods));
+				inputWorker(goods);
+				goods->next = head->next;
+				head->next = goods;
+				break;
+			}
+		case 2:
+			displayAll(head);
+			break;
+		case 3:
+			sort(head);
+			printf("排序完成！\n");
+			break;
+		case 4:
+			printf("请输入要删除的商品代码：");
+			scanf("%d",&id);
+			deleteWorker(head,id);
+			break;
+		case 5:
+			printf("请输入要查找的商品代码：");
+			scanf("%d",&id);
+			searchWorker(head,id);
+			break;
+		case 6:
+			printf("请输入要统计的分类：");
+			scanf("%d",&classification);
+			countWorker(head,classification);
+			break;
+		default:
+			printf("输入有误，请重新输入！\n");
+			break;
+		}
+	}
+	return 0;
+}