Exercise 1-13

Exercise 1-13 Write a program to print a histogram of the lengths of words in its input. It is easy to draw the histogram with the bars horizontal; a vertical orientation is more challenging

#include<stdio.h>

#define MAXWORD 100

void HorizontalDraw(const int len[], int nw){
    int i, n;
    for(i = 0; i < nw; i++){
        n = len[i];
        while(n > 0){
            putchar('*');
            n--;
        }
        putchar('\n');
    }
}

void VerticalDraw(const int len[], int nw){
    int i, max;
    for(max = 0, i = 0; i < nw; i++)
        if(max < len[i])
            max = len[i];
    while(max > 0){
        for(i = 0; i < nw; i++)
            if(len[i] >= max)
                putchar('*');
            else
                putchar(' ');
        putchar('\n');
        max--;
    }
}

int main(){
    int c, state, i;
    int len[MAXWORD];

    state = 0;
    i = -1;
    while((c = getchar()) != EOF){
        if(c == ' ' || c == '\t' || c == '\n')
            state = 0;
        else if(state == 0){
            state = 1;
            i++;
            len[i] = 1;
        }else
            len[i]++;
    }// i+1 words

    VerticalDraw(len, i + 1);
}