在当前目录中存在文件名为"case1.in"（其中case后为数字1，不是字母l，写错提交后会判错）的文本文件，
其内容为一篇英文文章（以EOF作为结束标志）。现要求读取该文本文件内容，统计文章中每个单词出现的次数，
并输出出现次数最多的前5个单词及其出现次数（按出现次数由多到少的顺序输出，次数相同时按字典顺序输出，
不足5个单词时，按序输出全部单词）。程序中注意如下细节：
（1）    空格、标点符号与回车符起到分隔单词的作用。
（2）    文章一行的末尾可能有连字符，出现连字符时，该行最末的字符串与下行最先出现的字符串构一个单词；
（3）    名词缩写算一个单词；
（4）    数字不算单词；
（5）    单词不区分大小写；
（6）    输出时单词全使用小写；


#include"stdio.h"
#include"string.h"
#include"malloc.h"
#include"math.h"
#include"stdlib.h"
#include"ctype.h"
#define LEN sizeof(struct word)


struct word
{
    char a[21];
    int n;
    struct word *next;
};


int k=0;



struct word *receive(FILE*fp)
{
    int i=0;
    struct word *p1,*p2,*head;
    char b[21];
    head=(struct word *)malloc(LEN);
    p1=p2=head;

    while((b[i]=fgetc(fp))!=EOF)
    {
        if(isalpha(b[i]))
        {i++;}
        else
        {
            if(i!=0)
            {
                b[i]='\0';
                strlwr(b);
                strcpy(p1->a,b);
                p1=(struct word*)malloc(LEN);
                p2->next=p1;
                p2=p1;
                i=0;
            }
        }


        if(isalpha(b[i-1]))
        {
            b[i]='\0';
            strlwr(b);
            strcpy(p1->a,b);
        }
    }
   

        p1->next=NULL;

        return head;
    }






    void count(struct word *head)
    {
        struct word *P,*p1,*p2;
        P=head;


        while(P->next!=NULL)
        {
            P->n=1;
            p1=P;
            p2=P->next;

            do
            {
                if(strcmp(P->a,p2->a)==0)
                {
                    P->n++;
                    p1->next=p2->next;
                    p2->next=NULL;
                    p2=p1->next;
                }
                else
                {
                    p1=p2;
                    p2=p2->next;
                }
            }while(P->next!=NULL);

            P=P->next;
        }

        return;
    }



    void arrange(struct word *head)
    {
        struct word *p,*p1;
        char t[21];
        int i,j,T;

        p=head;

        while(p!=NULL)
        {
            k++;
            p=p->next;
        }


        for(i=1;i<k;i++)
        {
            p=head;
            p1=p->next;


            for(j=1;j<k-i;j++)
            {
                if(p->n<p1->n)
                {
                    T=p->n;
                    p->n=p1->n;
                    p1->n=T;
                    strcpy(t,p->a);
                    strcpy(p->a,p1->a);
                    strcpy(p1->next,t);
                }
                else
                    if(p->n==p1->n)
                    {
                        if(strcpy(p->a,p1->a)>0)
                        {
                            strcpy(t,p->a);
                            strcpy(p->a,p1->a);
                            strcpy(p1->a,t);
                        }
                    }
               

                p=p->next;
                p1=p1->next;
            }
        }


        return ;
    }



    int main()
    {
        FILE *fp;
        struct word *head,*p;
        int i;


        if((fp=fopen("case.txt","r"))==NULL)
            return 0;

        head=receive(fp);
        count(head);
        arrange(head);
        k--;


        if(k<5)
        {
            p=head;
            while(p->next!=NULL)
            {
                printf("%s%7d\n",p->a,p->n);
                p->next;
            }
        }
        else
        {
            p=head;
            for(i=0;i<5;i++)
            {
                printf("%s%7d\n",p->a,p->n);
                p=p->next;
            }
        }


        fclose(fp);

        return 0;
    }

有人么？？？？

99我啊，版主何在？？？

我这个程序连读入字符都有问题，至少版主先帮我解决读入字符这部分吧，求求你，好人有好报~~~~~