动态连表程序的问题--help me

[ddxywhz]

#include <stdio.h>
#define NULL 0
#define LEN sizeof(struct student)
struct student
{long num;
float score;
struct student *next;
};
void print(struct student *head);
struct student *del(struct student *head,long num);
struct student *insert(struct student *head,struct student *stu);
struct student *creat(void);
int n;
main()
{struct student *head,*stu;
long del_num;
printf("input 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 delete 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("input the inserted record:");
stu=(struct student *)malloc(LEN);
scanf("%ld,%f",&stu->num,&stu->score);
}
}
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");return head;}
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--;
}
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++;
return head;
}
struct student *creat(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++;
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);
}
以上是全部程序,在tc2.0中,编译通过,单运行是显示:
input records:
99101,90
scanf : floating point formats not linked
Abnormal program termination
不知道为什末.高手指点.

[wangfengsdu]

好像TC2.0中有个bug，
不支持这样的写法：
如果一个结构体
struct AA{
float x;
......
};
struct AA *aa = ....;
不能够这样进行操作：
scanf("%f",&aa->x);
你可以这样进行
float y;
scanf("%f",&y);
aa->x = y;
看看吧，如果能够改正确的话，就给分吧。。

[dddd8888]

学习

[ywchen2000]

你的代码写的好乱呀，好难看呀。下面是我写的

#include<stdlib.h>
#include<stdio.h>
struct list{
int num;
char name[256];
int china;
int english;
int math;
struct list *next;
};
typedef struct list node;
typedef node *link;
printf_list(link head)
{
link pointer;
pointer=head;
while(pointer!=NULL)
{
printf("number:%d\n",pointer->num);
printf("name:%s\n",pointer->name);
printf("china:%d\n",pointer->china);
printf("english:%d\n",pointer->english);
printf("math:%d\n",pointer->math);
pointer=pointer->next;
}
}
link creat_list(link head)
{
int cnum;
char cname[256];
int cchina;
int cenglish;
int cmath;
link pointer,new;
int i;
head=(link)malloc(sizeof(node));
if(head==NULL)
{ printf("memory allocate failure!!\n");
exit(0);}
else{
printf("please input number:");
scanf("%d",&cnum);
printf("please input name:");
scanf("%s",&cname);
printf("please input china:");
scanf("%d",&cchina);
printf("please input english:");
scanf("%d",&cenglish);
printf("please input math:");
scanf("%d",&cmath);
head->num=cnum;
for(i=0;i<256;i++)
{
head->name[i]=cname[i];
}
head->china=cchina;
head->english=cenglish;
head->math=cmath;
head->next=NULL;
pointer=head;
while(1)
{
new=(link)malloc(sizeof(node));
if(new==NULL){
printf("memory allocate failure!!\n");
exit(0);}
printf("please input number:");
scanf("%d",&cnum);
if(cnum==0){
break; }
printf("please input name:");
scanf("%s",cname);
printf("please input china:");
scanf("%d",&cchina);
printf("please input english:");
scanf("%d",&cenglish);
printf("please input math:");
scanf("%d",&cmath);
new->num=cnum;
for(i=0;i<256;i++){
new->name[i]=cname[i];}
new->china=cchina;
new->english=cenglish;
new->math=cmath;
new->next=NULL;
pointer->next=new;
pointer=new;
}
}
return head;
}
search_chengji(int key1,link head)
{
link pointer;
pointer=head;
while(pointer!=NULL)
{
if(pointer->num==key1)
{
printf("number:%d\n",pointer->num);
printf("name:%s\n",pointer->name);
printf("china:%d\n",pointer->china);
printf("english:%d\n",pointer->english);
printf("math:%d\n",pointer->math);
}
pointer=pointer->next;
}
}
link modify_chengji(link head,int key3)
{

link pointer;
char xname[256];
int xchina;
int xenglish;
int xmath;
int choose,i;
pointer=head;
printf("enter 0 exit modefiy\n");
printf("enter 1 modefiy name\n");
printf("enter 2 modefiy china\n");
printf("enter 3 modefiy english\n");
printf("enter 4 modefiy math\n");
scanf("%d",&choose);
switch(choose)
{
case 1:
printf("please input name:");
scanf("%s",&xname);
break;
case 2:
printf("please input china:");
scanf("%d",&xchina);
break;
case 3:
printf("please input english:");
scanf("%d",&xenglish);
break;
case 4:
printf("please input math:");
scanf("%d",&xmath);
break;
}
while(1){
pointer=pointer->next;
if(pointer->num==key3)
{
if(choose==1)
{ for(i=0;i<256;i++)
{
pointer->name[i]=xname[i];
}
break;
}
else if(choose==2)
{ pointer->china=xchina;
break;}
else if(choose==3)
{ pointer->english=xenglish;
break;
}
else if(choose==4)
{pointer->math=xmath;
break;}
}
}
return head;
}
link delete_chengji(link head,int key2)
{
link pointer;
link back;
pointer=head;
while(1)
{
if(head->num==key2)
{ head=pointer->next;
free(pointer);
break;
}
back=pointer;
pointer=pointer->next;
if(pointer->num==key2)
{
back->next=pointer->next;
free(pointer);
break;}
}
return head;
}
link insert_chengji(link head,link new,int key3)
{
link pointer;
pointer=head;
while(1)
{
if(pointer==NULL){
new->next=head;
head=new;
break;}
if(pointer->num==key3){
new->next=pointer->next;
pointer->next=new;
break;}
pointer=pointer->next;
}
return head;
}
pingjufen(link head)
{
link pointer;
int pchina,ppchina;
int penglish,ppenglish;
int pmath,ppmath;
int count;
pchina=0;
penglish=0;
pmath=0;
count=0;
pointer=head;
while(1)
{
pchina=pchina+pointer->china;
penglish=penglish+pointer->english;
pmath=pmath+pointer->math;
count=++count;
if(pointer->next==NULL)
{
break;
}
pointer=pointer->next;
}
ppchina=pchina/count;
ppenglish=penglish/count;
ppmath=pmath/count;
printf("china ping jun fen:%d\n",ppchina);
printf("english ping jun fen:%d\n",ppenglish);
printf("math ping jun fen:%d\n",ppmath);
}
main()
{
for(;;)
{
link head;
link new;
int key;
int keynum;
printf("0>exit the programm.\n");
printf("1>create list.\n");
printf("2>search chengji.\n");
printf("3>modify chengji.\n");
printf("4>delete chengji.\n");
printf("5>add chengji.\n");
printf("6>pingjunfeng.\n");
printf("7>print chengji.\n");
scanf("%d",&key);
switch(key){
case 0:
exit(0);
case 1:
head=creat_list(head);
if(head!=NULL)
{ printf_list(head);}
break;
case 2:
printf("please input 0 Exit.\n");
printf("please input number for search:");
scanf("%d",&keynum);
if(keynum==0){
break; }
search_chengji(keynum,head);
break;
case 3:
printf("please input number for modify:");
scanf("%d",&keynum);
head=modify_chengji(head,keynum);
if(head!=NULL)
{
printf_list(head);
}
break;
case 4:
printf("please input 0 exit\n");
printf("please input number for delete:");
scanf("%d",&keynum);
if(keynum==0){
break; }
head=delete_chengji(head,keynum);
break;
case 5:
if(head!=NULL){
new=(link)malloc(sizeof(node));
printf("please input number:");
scanf("%d",&new->num);
if(new->num==0){
break;}
printf("please input name:");
scanf("%s",&new->name);
printf("please input china:");
scanf("%d",&new->china);
printf("please input english:");
scanf("%d",&new->english);
printf("please input math:");
scanf("%d",&new->math);
printf("please input the data number for insert:");
scanf("%d",&keynum);
head=insert_chengji(head,new,keynum);
if(head!=NULL) {
printf_list(head);}
}
break;
case 6:
pingjufen(head);
break;
case 7:
printf_list(head);
break;
}
}
}

[playboyxp]

二楼说错了
c支持struct AA *aa=....
楼主想必是抄书的吧
程序好像没错
但指针用多了有时是会出现一些意想不到的错误