#include<stdio.h>
#include<ctype.h>
#include<stdlib.h>

int main(void)
{
    struct horse
    {
        int age;
        int height;
        char name[20];
        char father[20];
        char mother[20];

        struct horse *next;
    };
   
    struct horse *first=NULL;
    struct horse *current=NULL;
    struct horse *previous=NULL;

    char test='\0';
    for(;;)
    {
        printf("Do you want to enter details of  a%s horse (Y or N)?",first!=NULL?"nother":" " );
        scanf("%c",&test);
        if(tolower(test)=='n') break;
        current=(struct horse *)malloc(sizeof(struct horse));
        if(first==NULL)
            first=current;
        if(previous!=NULL)
            previous->next=current;

        printf("\nEnter the name of the horse:");
        scanf("%s",current->name);

        printf("\nHow old is %s ? ",current->name );
        scanf("%d",&current->age );

        printf("\nHow high is %s (in hand)?",current->name);
        scanf("%d",&current->height);

        printf("\nWho is %s's father?",current->name);
        scanf("%s",current->father);

        printf("\n Who is %s's mother ? ",current->name);
        scanf("%s",current->mother);

        current->next=NULL;
        previous=current;
    }
  current=first;
  while(current!=NULL)
  {
    printf("\n\n%s is %d years old ,%d hands height.",current->name,current->age,current->height);
    printf("and has %s and %s as parents.",current->father,current->mother);

    previous=current;
    current=current->next;
    free(previous);
  }

    return 0;
}

为什么在输入第二只 horse 的 detail 时会出问题？导致链表输入无法结束。

[ 本帖最后由 司徒瑾贤 于 2010-9-14 18:03 编辑 ]

第一只输入的时候没问题？

已解决  是这样的：

#include<stdio.h>
#include<ctype.h>
#include<stdlib.h>

int main(void)
{
    struct horse
    {
        int age;
        int height;
        char name[20];
        char father[20];
        char mother[20];

        struct horse *next;
    };
   
    struct horse *first=NULL;
    struct horse *current=NULL;
    struct horse *previous=NULL;

    char test='\0';
    for(;;)
    {
        printf("\nDo you want to enter details of  a%s horse (Y or N)?",first!=NULL?"nother":" " );
        scanf("%c",&test);
        if(tolower(test)=='n') break;
                if(tolower(test)=='y')
               { 
        current=(struct horse *)malloc(sizeof(struct horse));
        if(first==NULL)
            first=current;
        if(previous!=NULL)
            previous->next=current;

        printf("\nEnter the name of the horse:");
        scanf("%s",current->name);

        printf("\nHow old is %s ? ",current->name );
        scanf("%d",&current->age );

        printf("\nHow high is %s (in hand)?",current->name);
        scanf("%d",&current->height);

        printf("\nWho is %s's father?",current->name);
        scanf("%s",current->father);

        printf("\nWho is %s's mother?",current->name);
        scanf("%s",current->mother);

        current->next=NULL;
        previous=current;
                fflush(stdin);
               }
    }
  current=first;
  while(current!=NULL)
  {
    printf("\n\n%s is %d years old ,%d hands height.",current->name,current->age,current->height);
    printf("and has %s and %s as parents.\n",current->father,current->mother);

    previous=current;
    current=current->next;
    free(previous);
  }
        system("pause");
        return 0;
}

这样的