11.8

这是我所有的家当哦,c语言源程序,其中有C语言二级考试的题目呢!

#include<malloc.h>
#define NULL 0
#define LEN sizeof(struct student)
struct student
{long num;
 float score;
 struct student *next;
};
int n;
struct student *creat(void)
{struct student *head,*p1,*p2;
 n=0;
 p1=p2=(struct student *)malloc(LEN);
 scanf("%ld,%f",&p1->num,&p1->score);
 head=NULL;
 while(p1->num!=0)
 {n=n+1;
  if(n==1) head=p1;
  else p2->next=p1;
  p2=p1;
  p1=(struct student *) malloc(LEN);
  scanf("%ld,%f",&p1->num,&p1->score);
 }
 p2->next=NULL;
 return(head);
}
void print(struct student *head)
{struct student *p;
 printf("\nNow,These %d records are:\n",n);
 p=head;
 if(head!=NULL)
  do
  {printf("%ld %5.1f\n",p->num,p->score);
  p=p->next;
  }while(p!=NULL);
}
struct student *del(struct student *head,long num)
{struct student *p1,*p2;
 if(head==NULL){printf("\nlist null!\n");goto end;}
 p1=head;end:
 while(num!=p1->num&&p1->next!=NULL)
 {p2=p1;p1=p1->next;}
 if(num==p1->num)
   {if(p1==head) head=p1->next;
   else p2->next=p1->next;
   printf("delete:%ld\n",num);
   n=n-1;
   }
 else printf("%ld not been found!\n",num);
 return(head);
}
struct student *insert(struct student *head,struct student *stud)
 {struct student *p0,*p1,*p2;
  p1=head;
  p0=stud;
  if(head==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(head==p1) head=p0;
      else p2->next=p0;
      p0->next=p1;}
     else {p1->next=p0;p0->next=NULL;}}
   n=n+1;
   return(head);
}

main()
{struct student *head,*stu;
 long del_num;
 printf("intput records:\n");
 head=creat();
 print(head);
 printf("\ninput the deleted number:");
 scanf("%ld",&del_num);
 while(del_num!=0)
  {head=del(head,del_num);
   print(head);
   printf("input the deleted number:");
   scanf("%ld",&del_num);}
  printf("\ninput the inserted record:");
  stu=(struct student *) malloc(LEN);
  scanf("%ld,%f",&stu->num,&stu->score);
  while(stu->num!=0)
  {head=insert(head,stu);
  printf(head);
  printf("input the inserted record:");
  stu=(struct student *) malloc(LEN);
  scanf("%ld,%f",&stu->num,&stu->score);
  }
}