哇哈哈哈 终于写完了 我的图书馆管理系统 多谢论坛各位的指点和度娘的帮助
程序代码：#include<stdio.h>
#include<string.h>
#include<malloc.h>
#include <windows.h>
struct book
{
int num;
char name[30];
char author[30];
int classnum;
char pub[30];
long int time;
float price;
struct book *next;
};
void new_book(struct book *head);
struct book *read_book();
struct book *new_book();
void input_book(struct book *head);
void output_all_book(struct book *head);
void find_book(struct book *head);
void delete_book(struct book *head);
void modify_book(struct book *head);
void save_book(struct book *head);
void main()
{
struct book *head=NULL;
int select,temp,i=0;
printf("是否导入图书库\n1·是\t2·否\n");
scanf("%d",&select);
if(select==1)
{
head=read_book();
if(head==NULL)
{
printf("读取文件失败，请退出系统\n");
i=1;
}
else
printf("导入完成\n");
}
else
{
printf("新建一个图书库\n");
head=new_book();
}
if(i!=1)
system("cls");
printf("想要做什么:\n");
while(1)
{
printf("1·录入书本\n2·输出所有书本信息\n3·查询书本\n4·书本删除\n5·修改书本\n6·保存\n7·退出系统\n");
scanf("%d",&select);
getchar();
system("cls");
switch(select)
{
case 1:input_book(head);break;
case 2:output_all_book(head);break;
case 3:find_book(head);break;
case 4:delete_book(head);break;
case 5:modify_book(head);break;
case 6:save_book(head);break;
case 7:break;
}
if(select==7)
{
printf("请确认保存\n1·已保存\n2·还未保存\n");
scanf("%d",&temp);
}
if(temp==1&&select==7)
break;
}
}
struct book *new_book()
{
struct book *p,*last,*head=NULL;
int i=1;
float x;
while(i==1)
{
p=(struct book*)malloc(sizeof(struct book));
printf("请输入书号");
scanf("%d",&p->num);
fflush(stdin);
printf("输入书名");
gets(p->name);
printf("输入作者");
gets(p->author);
printf("输入分类号");
scanf("%d",&p->classnum);
fflush(stdin);
printf("输入出版社");
gets(p->pub);
printf("输入出版时间");
scanf("%d",&p->time);
fflush(stdin);
printf("输入价格");
scanf("%f",&x);
p->price=x;
p->next=NULL;
if(head==NULL)
{
head=p;
last=p;
}
else
{
last->next=p;
last=p;
}
printf("是否继续？1·是\t2·否\n");
scanf("%d",&i);
}
return head;
}
void save_book(struct book *head)
{
FILE *fp;
struct book *p;
if((fp=fopen("book.txt","wb"))==NULL)
{
printf("打开文件失败");
}
p=head;
while(p)
{
fwrite(p,sizeof(struct book),1,fp);
p=p->next;
}
fclose(fp);
}
void modify_book(struct book *head)
{
struct book *p;
float x;
int temp_num,k=0,i;
printf("输入要修改的书号");
scanf("%d",&temp_num);
p=head;
while(p)
{
if(p->num==temp_num)
{
printf("输入修改后的书名");
gets(p->name);
printf("输入修改后作者");
gets(p->author);
printf("输入修改后分类号");
scanf("%d",&p->classnum);
printf("输入修改后出版社");
gets(p->pub);
printf("输入修改后出版时间");
scanf("%d",&p->time);
printf("输入修改后价格");
scanf("%f",&x);
x=p->price;
k=1;
}
p=p->next;
}
if(k==0)
printf("未找到该书\n");
}
void delete_book(struct book *head)
{
int temp_num;
struct book *p,*r;
printf("请输入要删除书的书号\n");
scanf("%d",&temp_num);
r=head;
p=head->next;
while(r)
{
if(r->num==temp_num)
{
r=p;
}
r=r->next;
p=p->next;
}
}
void find_book(struct book *head)
{
struct book *p;
int temp_num;
printf("请输入书号");
scanf("%d",&temp_num);
p=head;
while(p)
{
if(p->num==temp_num)
{
printf("书名%s\n",p->name);
printf("作者%s\n",p->author);
printf("分类号%d\n",p->classnum);
printf("出版社%s\n",p->pub);
printf("出版时间%d\n",p->time);
printf("价格%d\n",p->price);
}
p=p->next;
}
}
void output_all_book(struct book *head)
{
struct book *p;
int i=1;
p=head;
while(p)
{
printf("第%d本书的信息\n",i);
printf("书号%d\n",p->num);
printf("书名%s\n",p->name);
printf("作者%s\n",p->author);
printf("分类号%d\n",p->classnum);
printf("出版社%s\n",p->pub);
printf("出版时间%d\n",p->time);
printf("价格%d\n",p->price);
i++;
p=p->next;
}
}
void input_book(struct book *head)
{
struct book *p,*last;
int i=1;
float x;
last=head;
while(last->next!=NULL)
last=last->next;
while(i==1)
{
p=(struct book*)malloc(sizeof(struct book));
printf("请输入书号");
scanf("%d",&p->num);
fflush(stdin);
printf("输入书名");
gets(p->name);
printf("输入作者");
gets(p->author);
printf("输入分类号");
scanf("%d",&p->classnum);
fflush(stdin);
printf("输入出版社");
gets(p->pub);
printf("输入出版时间");
scanf("%d",&p->time);
fflush(stdin);
printf("输入价格");
scanf("%f",&x);
p->price=x;
p->next=NULL;
last->next=p;
last=p;
printf("是否继续？1·是\t2·否\n");
scanf("%d",&i);
}
}
struct book *read_book()
{
FILE *fp;
struct book *head,*last,*p;
head=NULL;
if((fp=fopen("book.txt","rb"))==NULL)
{
return NULL;
}
while(!feof(fp))
{
p=(struct book*)malloc(sizeof(struct book));
if(fread(p,sizeof(struct book),1,fp)==1)
{
p->next=NULL;
if(head==NULL)
{
head=p;
last=p;
}
else
{
last->next=p;
last=p;
}
}
}
fclose(fp);
return head;
}终于写完了 真心累啊 平时是睡神的我在这两天两夜睡眠加起来不超过八小时 当测试成功那一瞬间 激动的快泪奔了同时 也让我感觉自己是多么的菜 身为已经读了一年大学的我 连个链表都不会创建 真为自己感到汗颜
接下来一定要多看书 多看代码 多练习 落下的总归是要补上的
