工资管理系统

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include<malloc.h>

typedef struct
{
	long num;
	char name[10];
	char date[15];
	double pay;
}employee;
typedef struct node
{
	employee p;
	struct node *pre;
	struct node *next;
}node, *linklist;
linklist head, last;
void setdata(linklist p)
{
	printf("编号：");
	scanf("%ld", &p->p.num);
	printf("姓名:");
	scanf("%s", p->p.name);
	printf("入职日期:");
	scanf("%s", p->p.date);
	printf("工资:");
	scanf("%lf", &p->p.pay);
}
void insert(linklist p)
{
	p->next = last;
	last->pre->next = p;
	p->pre = last->pre;
	last->pre = p;
}
void add()
{
	char ch;
	do
	{
		linklist q = (linklist)malloc(sizeof(node));
		setdata(q);
		insert(q);
		printf("是否继续添加  (Y键继续)");
		getchar();
		scanf("%c", &ch);
	} while (ch == 'Y' || ch == 'y');
	system("pause");
}
linklist find()
{
	char Name[10];
	char Date[15];
	int i;
	linklist a=head->next;//临时指针
	printf("选择查询方式(1.姓名 2.入职日期)");
	scanf("%d", &i);
	if (i == 1)
	{
		printf("请输入需要查找的姓名:");
		scanf("%s", Name);
		while (a != last)
		{
			if (strcmp(Name, a->p.name) == 0)
				break;
			a = a->next;
		}
	}
	if (i == 2)
	{
		printf("请输入需要查找的入职日期");
		scanf("%s", Date);
		while (a != last)
		{
			if (strcmp(Name, a->p.date) == 0)
				break;
			a = a->next;
		}
	}
	if (a = last)
	{
		printf("未找到\n");
		system("pause");
	}
	return a;
}
void del()
{
	linklist a = NULL;
	linklist q = find();
	if (q !=last)
	{
		a = q->pre;//临时指针
		q->pre->next = q->next;
		q->next->pre = a;
		free(q);
	}
	else
		printf("管理系统未收录此信息,删除失败");
	system("pause");
}
void modifydata()
{
	linklist a;
	printf("请按要求输入以下信息");
	a = find();
	if (a != NULL)
	{
		setdata(a);
		printf("修改成功");
	}
	else
	{
		printf("\7管理系统未收录此信息,修改失败");
	}
	system("pause");
}
void show(linklist p)
{
	printf("%ld\t%s\t%s\t%.2lf\n", p->p.num, p->p.name, p->p.date, p->p.pay);
}
void sort()
{
	int ch;
	linklist a = head->next,b=a->next;
	char  x[15];
	int y;
	double z;
	printf("请选择排序方式:1.工号  2.姓名 3.入职日期  4.工资\n");
	scanf("%d", &ch);
	if (ch == 1)
	{
	for (; a != last; a = a->next)
		for (; b != last; b = b->next)
		{
			if (a->p.num > b->p.num)
			{
				y = a->p.num;
				a->p.num = b->p.num;
				b->p.num = y;
			}
		}
		printf("排序成功!\n");
		system("pause");
	}
	else if (ch == 2)
	{
		for (; a != last;a=a->next)
			for (; b != last; b = b->next)
			{
				if (strcmp(a->p.name, b->p.name)>0)
				{
					strcpy(x, a->p.name);
					strcpy(a->p.name, b->p.name);
					strcpy(b->p.name, x);
				}
			}
			printf("排序成功!\n");
	}
	else if (ch == 3)
	{
		for (; a != last; a = a->next)
			for (; b != last; b = b->next)
			{
				if (strcmp(a->p.date, b->p.date)>0)
				{
					strcpy(x, a->p.date);
					strcpy(a->p.date, b->p.date);
					strcpy(b->p.date, x);
				}
			}
			printf("排序成功!\n");
	}
	else if (ch == 4)
	{
		for (; a != last; a = a->next)
		for (; b != last; b = b->next)
		{
			if (a->p.pay > b->p.pay)
			{
				z = a->p.pay;
				a->p.pay = b->p.pay;
				b->p.pay = z;
			}
		}
		printf("排序成功!\n");
	}
	else
		printf("输入有误\7\n");
}
void Tongji()
{	
	linklist a = head->next;
	printf("工号\t姓名\t入职日期\t工资\n");
	while (a != last)
	{
		show(a);
		a = a->next;
	}
	system("pause");
}
void meun(void)
{
	printf("**********工资管理系统**********\n");
	printf("*           1.添加             *\n");
	printf("*           2.删除             *\n");
	printf("*           3.查询             *\n");
	printf("*           4.修改             *\n");
	printf("*           5.统计             *\n");
	printf("*           6.排序             *\n");
	printf("*           0.退出             *\n");
	printf("********************************\n");
}
int choose()
{
	int i;
	scanf("%d", &i);
	switch (i)
	{
	case 1:add(); break;
	case 2: del(); break;
	case 3: {linklist a = find(); if (a != last){ show(a); system("pause"); } break; }
	case 4: modifydata(); break;
	case 5: Tongji(); break;
	case 6: sort(); break;
	case 0: printf("欢迎使用本系统!"); break;
		default:printf("输入有误!,请重新操作!\7");
		break;
	}
	return i;
}
void destroy()
{
	linklist p = head->next;
	while (p != last)
	{
		head->next = p->next;
		free(p);
		p = head->next;
	}
	free(head);
	free(last);
}
int main()
{
	int i=1;
	head = (linklist)malloc(sizeof(node));
	last = (linklist)malloc(sizeof(node));
	head->next = last;
	last->next = NULL;
	head->pre = NULL;
	last->pre = head;
	while (i=1)
	{
		meun();
		i = choose();
		system("cls");
	}
	system("pause");
	destroy();
	return 0;
}