编写一个文章,打印其输入文件中单词长度的直方图 代码如下
#include <stdio.h>#define MAXWORDLEN 10
int main(void)
{
int c;
int inspace = 0;
long lengtharr[MAXWORDLEN + 1];
int wordlen = 0;
int firstletter = 1;
long thisval = 0;
long maxval = 0;
int thisidx = 0;
int done = 0;
for(thisidx = 0; thisidx <= MAXWORDLEN; thisidx++)
{
lengtharr[thisidx] = 0;
}
while(done == 0)
{
c = getchar();
if(c == ' ' || c == '\t' || c == '\n' || c == EOF)
{
if(inspace == 0)
{
firstletter = 0;
inspace = 1;
if(wordlen <= MAXWORDLEN)
{
if(wordlen > 0)
{
thisval = ++lengtharr[wordlen - 1];
if(thisval > maxval)
{
maxval = thisval;
}
}
}
else
{
thisval = ++lengtharr[MAXWORDLEN];
if(thisval > maxval)
{
maxval = thisval;
}
}
}
if(c == EOF)
{
done = 1;
}
}
else
{
if(inspace == 1 || firstletter == 1)
{
wordlen = 0;
firstletter = 0;
inspace = 0;
}
++wordlen;
}
}
for(thisval = maxval; thisval > 0; thisval--)
{
printf("%4d | ", thisval);
for(thisidx = 0; thisidx <= MAXWORDLEN; thisidx++)
{
if(lengtharr[thisidx] >= thisval)
{
printf("* ");
}
else
{
printf(" ");
}
}
printf("\n");
}
printf(" +");
for(thisidx = 0; thisidx <= MAXWORDLEN; thisidx++)
{
printf("---");
}
printf("\n ");
for(thisidx = 0; thisidx < MAXWORDLEN; thisidx++)
{
printf("%2d ", thisidx + 1);
}
printf(">%d\n", MAXWORDLEN);
return 0;
}
firstletter在这里有什么用? 还有垂直方向是怎么实现直方图的?