/*参考答案*/

#include
#include
#include
#include

char xx[50][80] ;
int yy[5] ;
int maxline = 0 ; /* 文章的总行数 */

int ReadDat(void) ;
void WriteDat(void) ;

void ComWord(void)
{
int i,j,k,n,len,s[4] = {2,4,6,8};
char word[20],c;

memset(yy,0,5*sizeof(int));

for(i = 0; i < maxline; i++)
{
len = strlen(xx);

n = 0;
for(j = 0; j < len+1; j++)
{
c = xx[j];

if((c>='a' && c<='z') || (c>='A' && c<='Z'))
{
word[n] = c;
n++;
}
else
{
word[n] = '\0';

if(word[0] != '\0')
{
for(k = 0; k < 4; k++)
if(n == s[k])
yy[k]++;

yy[4]++;
}
n = 0;
}
}
}
}

void main()
{
int i ;

clrscr() ;
for(i = 0 ; i < 5 ; i++) yy = 0 ;
if(ReadDat()) {
printf("数据文件ENG.IN不能打开!\n\007") ;
return ;
}
ComWord() ;
WriteDat() ;
}

int ReadDat(void)
{
FILE *fp ;
int i = 0 ;
char *p ;

if((fp = fopen("eng.in", "r")) == NULL) return 1 ;
while(fgets(xx, 80, fp) != NULL) {
p = strchr(xx, '\n') ;
if(p) xx[p - xx] = 0 ;
i++ ;
}
maxline = i ;
fclose(fp) ;
return 0 ;
}

void WriteDat(void)
{
FILE *fp ;
int i ;

fp = fopen("ps3.out", "w") ;
for(i = 0 ; i < 5 ; i++) fprintf(fp, "%d\n", yy) ;
printf("单词长度为3的单词数=%d\n", yy[0]) ;
printf("单词长度为5的单词数=%d\n", yy[1]) ;
printf("单词长度为7的单词数=%d\n", yy[2]) ;
printf("单词长度为9的单词数=%d\n", yy[3]) ;
printf("单词的总数=%d\n", yy[4]) ;
fclose(fp) ;
}