حساب تكرار الكلمات في ملف

#include <iostream>
#include <fstream>
#include <list>
using namespace std;

int main()
{

	list<string> mylist;
	list<string>::iterator it;
	list<string>::iterator copy;

	ifstream IN;
	IN.open("file.txt");

	if ( IN.fail() )
	{
		cout << "error read\n";
		return 1;
	}

	string gotten;

	while (  IN  >> gotten )
		mylist.push_back(gotten);
	int x;
	while( !mylist.empty())
	{
		x=0;	
		copy = mylist.begin();
		for(it = mylist.begin() ; it!=mylist.end(); it++)
			if ( *it == *copy)
				x++;
		cout << *copy << " has appeared " << x << " times\n";

		mylist.remove(*copy);
	}

	return 0;
}

[ahmed@T400 c++]$ cat file.txt 
hi hi hi ahmed ahmed hahaha ok mashy :/

[ahmed@T400 c++]$ ./a.out 
hi has appeared 3 times
ahmed has appeared 2 times
hahaha has appeared 1 times
ok has appeared 1 times
mashy has appeared 1 times
:/ has appeared 1 times

بس سؤال؟

هل حيكون عندك الأمانة الكافية أنك تقول مش أنا إلي حليت السؤال دة؟