[作业提交]甲鱼的结构体作业

牡丹花下死做鬼 · 发表于 2013-8-17 17:04:16

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折腾了半天没心思写注释了代码很烂但貌似可以用希望高手勿喷啊 ~~~~(>_<)~~~~

个人技术放在这了~~~~(>_<)~~~~

#include<stdio.h>
#include<malloc.h>
#include<string.h>
#define LEN sizeof(struct student)
struct student *create();//创建链表
struct student *del(struct student *head,int num);//删除链表中数字 (链表头指针，要删除的学号)
struct student *insert(struct student *head,struct student *head_2);//网链表中加元素(链表头指针，要加的那个的)
void print(struct student *head);//输出链表
struct student *clear(struct student *head);//清空链表
void change(struct student *head,int num,float score);//更改链表数据
struct student
{
long int num;
float score;
struct student *next;
};
int n;
char ch;
int main()
{
struct student *head,head_2;
int num,i;
float score;
printf("请先建立一个链表!(要结束请在number处输入0)\n");
head = create();
s: setbuf(stdin,NULL);
printf("---------------------------------------------------------\n");
printf("请选择要的操作:\n");
printf("1.打印记录 ");
printf("2.插入记录 ");
printf("3.删除记录 \n");
printf("4.更改记录 ");
printf("5.清除记录 ");
printf("6.退出程序 \n");
printf("---------------------------------------------------------\n");
scanf("%d",&i);
switch(i)//根据用户输入的不同数字来执行不同的代码
{
case 1:
print(head);
goto s;
break;
case 2:
s4: setbuf(stdin,NULL);
printf("what number are you want to insert:");
scanf("%d",&head_2.num);
while((ch=getchar())!='\n')
{
if((ch>=48&&ch<=57)||ch==46)
{
;
}
else
{
printf("你的输入有误!\n");
goto s4;
}
}
s5: setbuf(stdin,NULL);
printf("what score are you want to insert:");
scanf("%f",&head_2.score );
while((ch=getchar())!='\n')
{
if((ch>=48&&ch<=57)||ch==46)
{
;
}
else
{
printf("你的输入有误!\n");
goto s5;
}
}
head = insert(head,&head_2);
goto s;
break;
case 3:
s6: setbuf(stdin,NULL);
printf("please putinto the number you want to delete:");
scanf("%ld",&num);
while((ch=getchar())!='\n')
{
if((ch>=48&&ch<=57)||ch==46)
{
;
}
else
{
printf("你的输入有误!\n");
goto s6;
}
}
head = del(head,num);
goto s;
break;
case 4:
s7: setbuf(stdin,NULL);
printf("Please putinto the number you want to change:");
scanf("%d",&num);
while((ch=getchar())!='\n')
{
if((ch>=48&&ch<=57)||ch==46)
{
;
}
else
{
printf("你的输入有误!\n");
goto s7;
}
}
s8: setbuf(stdin,NULL);
printf("Please putinto the score you want to save:");
scanf("%f",&score);
while((ch=getchar())!='\n')
{
if((ch>=48&&ch<=57)||ch==46)
{
;
}
else
{
printf("你的输入有误!\n");
goto s8;
}
}
change(head,num,score);
break;
case 5:
head=clear(head);
break;
case 6:
return 0;
break;
default:
printf("对不起,你的输入有误,请重新输入!");
goto s;
break;
}
goto s;
}
struct student *create()
{
struct student *head;
struct student *p1,*p2;
s: setbuf(stdin,NULL);
head = NULL;
p1 = p2 = (struct student *)malloc(LEN);
printf("Please purinto student's munber:");
scanf("%ld",&p1->num );
while((ch=getchar())!='\n')
{
if((ch>=48&&ch<=57)||ch==46)
{
;
}
else
{
printf("你的输入有误!\n");
goto s;
}
}
s1: printf("Please putinto student's score:");
setbuf(stdin,NULL);
scanf("%f",&p1->score );
while((ch=getchar())!='\n')
{
if((ch>=48&&ch<=57)||ch==46)
{
;
}
else
{
printf("你的输入有误!\n");
goto s1;
}
}
n = 0;
while(p1->num )
{
n++;
if(n==1)
{
head = p1;
}
else
{
p2->next =p1;
}
p2 = p1;
p1 = (struct student *)malloc(LEN);
s2: setbuf(stdin,NULL);
printf("Please purinto student's munber:");
scanf("%ld",&p1->num );
while((ch=getchar())!='\n')
{
if((ch>=48&&ch<=57)||ch==46)
{
;
}
else
{
printf("你的输入有误!\n");
goto s2;
}
}
if(p1->num ==0)
{
goto e;
}
s3: setbuf(stdin,NULL);
printf("Please putinto student's score:");
scanf("%f",&p1->score );
while((ch=getchar())!='\n')
{
if((ch>=48&&ch<=57)||ch==46)
{
;
}
else
{
printf("你的输入有误!\n");
goto s3;
}
}
}
e: p2->next =NULL;
return head;
}
void print(struct student *head)
{
struct student *p;
p = head;
printf("共有%d条记录:\n",n);
if(head)
{
do
{
printf("%ld号学生的成绩是:%f\n",p->num,p->score);
p = p->next ;
}while(p);
}
}
struct student *del(struct student *head,int num)
{
struct student *p1,*p2;
if(NULL == head)
{
printf("The List is NULL!\n");
goto END;
}
p1 = head;
while(p1->num !=num&&p1->next !=NULL)
{
p2 = p1;
p1 = p1 ->next ;
}
if(num == p1->num )
{
if(p1 == head)
{
head = p1 ->next ;
printf("Delete NO.%d succeed!\n",num);
n--;
}
else
{
p2->next =p1->next ;
printf("Delete NO.%d succeed!\n",num);
n--;
}
}
else
{
printf("NO.%d not been found!\n",num);
}
END:
return head;
}
struct student *insert(struct student *head,struct student *head_2)
{
struct student *p0,*p1,*p2;
p0 = head_2;
p1 = head;
if(p1==NULL)
{
head = p0;
p0->next =NULL;
}
else
{
while(p0->num >p1->num && p1->next !=NULL)
{
p2 = p1;
p1 = p1 ->next ;
}
if(p0->num <= p1->num)
{
if(p1 == head)
{
head = p0;
}
else
{
p2->next =p0;
}
p0->next =p1;
}
else
{
p1->next =p0;
p0->next =NULL;
}
}
n++;
e: return head;
}
struct student *clear(struct student *head)
{
head = NULL;
n=0;
printf("以清除全部记录!\n");
return head;
}
void change(struct student *head,int num,float score)
{
struct student *p1,*p2;
if(head == NULL)
{
printf("This is a NULL!\n");
goto end_2;
}
p1 = head;
while(p1->num !=num&&p1->next !=NULL)
{
p2 = p1;
p1=p1->next ;
}
if(p1->num ==num)
{
p1->score = score;
}
else
{
printf("NO.%d not been found!",num);
}
end_2:
printf("");
}

复制代码

牡丹花下死做鬼 · 发表于 2013-8-17 17:04:51

我自己都有点看不下去了 ~~~~(>_<)~~~~ 可我没其他办法啊

Potato丶 · 发表于 2013-8-17 17:34:21

不能实现保存到文件里吗？
这样好像每次都得重新输入的样子。
{:7_172:}

牡丹花下死做鬼 · 发表于 2013-8-17 17:35:39

Potato丶发表于 2013-8-17 17:34

登录/注册后可看大图

不能实现保存到文件里吗？
这样好像每次都得重新输入的样子。

现在这不是还没没看到文件操作嘛刚刚看到结构体
真的不会啊

yunkee · 发表于 2013-8-17 17:39:26

加油。。。好长阿

Potato丶 · 发表于 2013-8-17 17:53:53

牡丹花下死做鬼发表于 2013-8-17 17:35

登录/注册后可看大图

现在这不是还没没看到文件操作嘛刚刚看到结构体
真的不会啊

{:7_158:}好吧。我搞混了。我记得以后文件操作也有个类似的作业。
不过那个功能就局限了。在文件中删除记录什么的据说要重写文件才能实现。

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