C语言链表——电视机管理系统

桃扇骨 2023-03-14 05:49 3阅读 0赞

#include "stdio.h"
    #include "stdlib.h" //malloc
    #include "string.h"
    
    
    typedef struct { 
    	char no[4];   //4位编号
    	char name[20]; //品牌
    	int peace;     //价格
    }TV;
    
    
    //链表结点的定义：
    typedef struct LNode { 
    	TV   data;       //数据域
    	struct LNode* next;   //指针域
    }LNode, * LinkList;
    //电视机信息
    void in(LNode* head)
    { 
    	LinkList p, r;  //p指向新结点； r指向当前链表的尾结点
    	int i, n;  //n表示电视机数量
    	r = head;
    	printf("您想要输入多少种电视机信息呢？");
    	scanf("%d", &n);
    	printf("开始输入:\n");
    	for (i = 1; i <= n; i++)
    	{ 
    		p = (LinkList)malloc(sizeof(LNode));
    		p->next = NULL;
    		printf("编号:");
    		scanf("%s", p->data.no);
    		printf("品牌:");
    		scanf("%s", p->data.name);
    		printf("价格:");
    		scanf("%d", &p->data.peace);
    		r->next = p;
    		r = r->next;
    		printf("-----------------------------------------\n");
    	}
    	printf("********************************************************\n");
    }
    
    
    
    //输出电视机信息
    void out(LNode* head)
    { 
    	LinkList p;
    	p = head;
    	printf("请输出电视机的信息：\n\n");
    	printf("序号\t品牌\t价格\n");
    	while (p->next != NULL)
    	{ 
    		p = p->next;
    		printf("%s\t%s\t%d\n", p->data.no, p->data.name, p->data.peace);
    	}
    }
    
    void research_1(LNode* head, TV e)
    { 
    	LinkList p;
    	p = head;
    	printf("请输入查找的品牌：\n");
    	scanf("%s", e.name);
    	while ((p->next != NULL) && strcmp(e.name, p->data.name))
    	{ 
    		p = p->next;
    	}
    	printf("序号 %s\t 价格 %d\n", p->data.no, p->data.peace);
    }
    
    
    void research_2(LNode* head, int i)
    { 
    	int k;
    	LinkList p;
    	printf("请输入您要查询的电视机编号：");
    	scanf("%d", &i);
    	if (i < 0)
    	{ 
    		printf("抱歉，没有为您查到这条信息\n");
    	}
    	p = head; k = 0;
    	while (p->next != NULL && k < i)
    	{ 
    		p = p->next;
    		k = k + 1;
    	}
    	if (i == k)
    		printf("序号：%s\t 品牌： %s\t价格： %d\n", p->data.no, p->data.name, p->data.peace);
    	else
    		printf("查找失败！\n");
    }
    
    
    void insert(LNode* head, int i, TV e)
    { 
    	int k;
    	LinkList p, r;
    	r = head; k = 0;
    	printf("您为这台电视准备的编号是：\n");
    	scanf("%d", &i);
    	printf("请输入电视机信息：\n");
    	printf("序号:\n");
    	scanf("%s", e.no);
    	printf("品牌:\n");
    	scanf("%s", e.name);
    	printf("价格:\n");
    	scanf("%d", &e.peace);
    	while (r != NULL && k < i - 1)
    	{ 
    		r = r->next;
    		k = k + 1;
    	}
    	if (r == NULL)
    	{ 
    		printf("插入失败！\n");
    	}
    	p = (LinkList)malloc(sizeof(LNode));
    	p->data = e;
    	p->next = r->next;
    	r->next = p;
    	printf("插入成功！\n");
    }
    
    
    void delete_1(LNode* head, int i, TV* e)
    { 
    	LinkList p, r;
    	int k;
    	r = head; k = 0;
    	printf("请输入你要删除的位置：\n");
    	scanf("%d", &i);
    	while (r->next != NULL && k < i - 1)
    	{ 
    		r = r->next;
    		k++;
    	}
    	if (r == NULL)
    	{ 
    		printf("删除失败！\n");
    	}
    	p = r->next;
    	r->next = p->next;
    	*e = p->data;
    	free(p);
    	printf("删除成功！\n");
    }
    
    
    void number(LNode* head)
    { 
    	int i;
    	LinkList p;
    	p = head->next; i = 0;
    	while (p != NULL)
    	{ 
    		p = p->next;
    		i++;
    	}
    	printf("电视机总数为：%d\n", i);
    	printf("\n");
    }
    
    void  exit_1()
    { 
    	printf("退出成功！请按任意键结束！");
    	exit(0);
    }
    
    
    int main()
    { 
    	system( "color F1 ");
    	//system( "pause ");
    	//return 0; 
    	LNode* head;
    	head = (LinkList)malloc(sizeof(LNode));
    	head->next = NULL;
    	int select = -1;
    	int i;
    	TV e;
    	printf("********************************************************************\n");
    	printf("@ 1. 想要输入的品牌数量，并填写电视机信息\n");
    	printf("@ 2. 为您查看系统中的电视机信息 \n");
    	printf("@ 3. 为您查询电视机品牌\n");
    	printf("@ 4. 为您查找相应编号的电视机\n");
    	printf("@ 5. 在库存中新建一条电视机信息\n");
    	printf("@ 6. 为您删除指定编号的电视机信息 \n");
    	printf("@ 7. 库存电视机的数量\n");
    	printf("@ 8. EXIT\n");
    	printf("********************************************************************\n");
    	printf("\n");
    	while (select != 0)
    	{ 
    		printf("您想要做什么？");
    		scanf("%d", &select);
    		printf("\n");
    		switch (select)
    		{ 
    		case 1: in(head); break;
    		case 2: out(head); break;
    		case 3: research_1(head, e); break;
    		case 4: research_2(head, i); break;
    		case 5: insert(head, i, e); break;
    		case 6: delete_1(head, i, &e); break;
    		case 7: number(head); break;
    		case 8: exit_1(); break;
    		}
    	}
    	return 0;
    }