程序如下:
#include "stdio.h"
#define NULL 0
#define LEN sizeof(struct student)
struct student
{
long num;
float score;
struct student *next;
};
int n;
struct student *cread(void)
{
struct student *head;
struct student *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);
printf("the secend recore:");
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("\nno list!\n");goto end;}
p1=head;
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);
end: 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_name;
printf("input records:\n");
head=cread();
print(head);
printf("\ninput the deleted number:");
scanf("%ld",&del_name);
while(del_name!=0)
{head=del(head,del_name);
print(head);
printf("input the delete num:");
scanf("%ld",&del_name);
}
printf("\ninput the inserted recore:");
stu=(struct student * )malloc(LEN);
scanf("%ld,%f",&stu->num,&stu->score);
while(stu->num!=0)
{head=insert(head,stu);
print(head);
printf("input the insert record:");
stu=(struct student *)malloc(LEN);
scanf("%ld,%f",&stu->num,&stu->score);
}
}
编译.连接通过,在执行时:输入学生序号与成绩时,只能得到学生序号,而不能得到成绩,也就是说scanf没有完成指定工作,,不知道那里问题,是tc2.0,XP系统,
输入101时可正常运行,如输入101,89时,就退出提示如下"
scanf: floating point formats not linked
Abnormal program terminstion
不知道什么意思,是不是我creat函数里用scanf用的不对啊,,用了这么多次了,应该不会啊.
F7进入:
struct student *cread(void)
{
struct student *head;
struct student *p1,*p2;
n=0;
p1=p2=(struct student *)malloc(LEN);
scanf("%ld%f",&p1->num,&p1->score);
head=NULL;
查p1->num时,为正常,p1->score时为:1.1111111156484.
具体情况就这样了.
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