大家看看吧
这是一个打印输入中单词长度的直方图的程序,但是我看不懂大家给讲讲吧!#include<stdio.h>
#define MAXHIST 15
#define MAXWORD 11
#define IN 1
#define OUT 0
void main()
{
int c,i,nc,state;
int len;
int maxvalue;
int ovflow;
int wl[MAXWORD];
state=OUT;
nc=0;
ovflow=0;
for(i=0;i<MAXWORD;++i)
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 - %5d:",i,wl[i]);
if(wl[i]>0)
{
if((len=wl[i]*MAXHIST/maxvalue)<=0)
len=1;
}
else
len=0;
while(len>0)
{
putchar('*');
--len;
}
putchar('\n');
}
if(ovflow>0)
printf("there are %d words >=%d\n",ovflow,MAXWORD);
}