#include <iostream>

using namespace std;

string sentence;
int wordCount = 0;

// This assignment is worth 4 points.

int main()
{
	cout << "Enter sentence: ";
	getline(cin, sentence);

	for(int i = 0; i < sentence.length() - 1; i++)
	{
		/* Check whether if a space, comma, or period is followed by a
		 * letter or a number. This indicates a new word present. Use
		 * length() - 1 as the loop limit because this method means
		 * there is no need to check the last character of the string.
		 */
		if(
		   (sentence[i] == ' ' || sentence[i] == '.' || sentence[i] == ',')
		  	&&
		   (sentence[i+1] >= 'a' && sentence[i+1] <= 'z'
		    || sentence[i+1] >= 'A' && sentence[i+1] <= 'Z'
		    || sentence[i+1] >= '0' && sentence[i+1] <= '9')
		  )
			wordCount++;
	}

	// Also check if the very first character is a letter or number.
	if(sentence[0] >= 'a' && sentence[0] <= 'z'
           || sentence[0] >= 'A' && sentence[0] <= 'Z'
           || sentence[0] >= '0' && sentence[0] <= '9')
		wordCount++;

	cout << "Word count: " << wordCount << endl;

	return 0;
}