Maps

[bluegray]

I am writing a program that reads in from a txt file using cin NOT fstream, assignment guidelines. It takes the words and separates any punctuation marks. The clean_entry function is already written. I am having a hard time figuring out how to implement it into the get_word function. Could someone explain how to do this.

This is what i have so far.

#include <cstdlib>
#include <iostream>
#include <string>
#include <map>
#include <iomanip>
#include <fstream>

using namespace std;

typedef map<string, int> mapType;


void clean_entry(const string& source, string& target)
{
	int p1 = 0, p2;
	while(!isalnum(source[p1]) && p1 < source.length()) p1++;
	p2 = p1;
	while(isalnum(source[p2])&& p2 < source.length()) p2++;
	if( p2 == p1 ) target = "";
	else target = source.substr(p1, p2-p1);
	return;
}

void print_words(const map<string, int>& wordcounts, int nemptyw)
{
	int i = 0;
	cout << "Nonemmpty words : " << nemptyw << endl;
	cout << "Distinct  words : " << wordcounts.size() << endl;
    for(mapType::const_iterator it = wordcounts.begin(); it != wordcounts.end(); ++it)
    {
		cout << setw (15);
		cout << setiosflags (ios_base::left);
        cout << it->first << " - " << it->second << "  ";
		if (++i >= 3 ) 
		{
			i = 0;
			cout << endl;
		}
    }
	cout << endl;
}


int get_words(map<string, int>& wordcounts)
{
  string line;
  string cleaned_word;
  int count_new = 0;

    cin >> line;	  
    while (cin)
    {
	wordcounts[line]++;
	cin >> line;
		
     }	 
print_words(wordcounts, count_new);
  
  return count_new;
}
 
int main()
{
    mapType wordcounts;
 
    get_words(wordcounts);
 
    return 0;
}