书后练习--直方图

程序不是很复杂，就是调节显示样式花点时间！！

#include <stdio.h>
#define LENGTH 10

/* 打印输出单词的长度的直方图 */

void main()
{
    /* x_length 单词的长度 */
    int x_length, c, i, j;
    int arr[LENGTH] = {0};

    x_length = i = j = 0;
    
    while ( (c = getchar() ) != EOF )
    {

        if ( c == ' ' || c == '\n' || c == '\t')
        {
            if ( x_length >= LENGTH-1 )
            {
                arr[LENGTH-1]++;
            }
            else
            {
                arr[x_length]++;
            }
            x_length = 0;
        }
        else
        {
            x_length++;
        }    
    }
    
    printf("单词长度\n");

    for ( i = LENGTH-1; i > 0; i--)
    {
        if ( i == LENGTH-1 ) 
        {
            printf("  %d+|", i);
        }
        else
        {
            printf("  %2d|", i);
        }        
        if ( arr[i] != 0 )
        {
            for ( j = 1; j < arr[i]; j++ )
            {
                printf("   ");
            }
            printf("*");
        }
        printf("\n");
    }
    
    printf("     ");

    for ( i = 1; i <= LENGTH-1; i++ )
    {
        printf("-  ");
    }

    printf("\n   ");
    
    for ( i = 1; i <= LENGTH-1; i++ )
    {
        if ( i == LENGTH-1 ) 
        {
            printf(" %d+(单词出现次数)\n", i);
        }
        else
        {
            printf(" %2d", i);
        }
    }

}

结果：