Exercise_1-13.cpp

// Exercise 1-13 Write a program to print a histogram of the lengths of words in its input. It is easy to draw the historgram with the bars horizontal, a vertical orientation is more challenging.
#include <stdio.h>

#define IN 1
#define OUT 0

int main()
{
	int c;
	int wordCount = 0;
	int state = OUT;

	while ((c = getchar()) != EOF)
	{
		if (c >= 'a' && c <= 'z')
		{
			wordCount += 1;
			state = IN;
			putchar(c);
		}
		else if (c == ' ' || c == '\n' || c == '\t')
		{
			if (state == IN)
			{
				printf(": ");
				for (int i = 0; i < wordCount; ++i)
				{
					printf("+");
				}
					wordCount = 0;
					state = OUT;
					printf("\n");
			}
		}
	}
}