wordcmp.c

wordcmp为一个文字比对的方法

   #include <stdio.h>
   #include <stdlib.h>
   #include <string.h>
   #define fn"13-4-1.txt"
   
   typedef struct word
   {
    char str[20];
    int num;
    struct word *nxt;
      
   }WORD;
   
   int main(void)
    {
     char s[20];
     FILE *fp;
     WORD *head,*p;
     fp=fopen(fn,"r");
     p=(WORD*)malloc(sizeof(WORD));
     head=p;
     head->num=1;
     head->nxt=NULL;
     
     
     
     
     while(fscanf(fp,"%s",s)!=EOF)
     {
       WORD *cmp=head;
       char flag=0;
       while(cmp!=NULL)
        {
         if(!strcmp(cmp->str,s))
         {
           cmp->num++;
           flag=1;
           break;
          }
         else
         cmp=cmp->nxt;
         }
        if(!flag)
         {
          p->nxt=(WORD*)malloc(sizeof(WORD));
          p->nxt->num=1;
          p->nxt->nxt=NULL;
          strcpy(p->nxt->str,s);
          p=p->nxt;
         }             
        }
        p=head;
        while(p!=NULL)
        {
         printf("%10s:%d times\n",p->str,p->num);              
         p=p->nxt;            
       }
       while(head!=NULL)
        {
         WORD *tmp;
         tmp=head;
         head=head->nxt;
         free(tmp);                
        }
        fclose(fp);
        system("pause");
        return 0;
        }