啥是直方图啊!我晕
the c answer book习题解答练习1-13 编写一个程序,打印输入中单词长度的直方图。
#include <stdio.h>
#define MAXHIST 15
#define MAXWORD 11
#define IN 1
#define OUT 0
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);
}
书上代码,我编译运行后,只有纵向的0123456789,和0000000000
C语言里的直方图是什么样子的?
还有the c programming language 里的练习题怎么这么难啊?
都没学到过直方图,就让我画图,咱是新手啊!