c程序设计语言官方题解版勘误1

#include <stdio.h>
#define MAXHIST 15
#define MAXWORD 11
#define IN  1
#define OUT  0
//打印输入中单词长度的水平方向直方图，
void main()
{
 int c, i, nc, state;
 int len;     //length of each bar
 int maxvalue;    //maximum value for wl[]
 int ovflow;     //number of overflow words
 int wl[MAXWORD];   //word length count
 
 state = OUT;
 nc = 0;                     //number of chars in a word
 ovflow = 0;
 for (i = 0; i < MAXWORD; ++i)//数组初始化
  wl[i] = 0;
 
 
 while((c = getchar()) != EOF){
  if (c == ' ' || c == '\n' || c == '\t'){
   state = OUT;
   if(nc > 0)
    if(nc < MAXWORD)
     ++wl[nc];
    else
     ++ovflow;
   nc = 0;
  }else if (state == OUT){
   state = IN;
   nc = 1;
  }else
   ++nc;
 }
 
  maxvalue = 0;
 for (i = 1; i < MAXWORD; ++i)
  if (wl[i] > maxvalue)
   maxvalue = wl[i];
  
 for (i = 1; i < MAXWORD; ++i){
  printf("%5d - %d : ",i, wl[i]);
  if(wl[i] > 0) {
     if((len * wl[i] * MAXHIST / maxvalue) <= 0)
    len = wl[i];//书上此处本来为len = 1
  }else
   len = 0;
  while (len > 0){
   putchar('*');
   --len;
  }
  putchar('\n');
 }
 if (ovflow > 0)
  printf("There are %d words >= %d\n", ovflow, MAXWORD);
  }