#ifndef _IOSTREAM_H
#define _IOSTREAM_H
#include <iostream>
#include <cstring>

using namespace std;

int main(int argc, char* argv[])
	{
	if (argc == 1)	//if no argument is passed
		{
		cerr << "Usage: test [option]\n";
		return 1;
		}
	
	int range1, range2, range[10], i = 0;
	string temp, arg(argv[1]);
	//here's the really messy part. The program first checks whether the argument contains a ','. If yes, it then checks for a '-'. If yes, it handles the argument accordingly.

	while (arg.length() > 0)
		if (arg.find(",") < arg.length())
			if (arg.find("-") < arg.length())
				{
				int loc = arg.find_first_of(",-");
				switch (arg[loc])
					{
					case '-':
						arg.replace(loc, 1, "%");
						temp = arg.substr(0, loc);
						range1 = atoi(temp.c_str());
						int nextloc;
						nextloc = arg.find_first_of("-,");
						if (nextloc < arg.length())
							{
							temp = arg.substr(loc + 1, nextloc - loc - 1);
							arg.erase(0, nextloc + 1);
							}
						else
							{
							temp = arg.substr(loc + 3);
							arg.erase(0, loc + 1);
							}
						range2 = atoi(temp.c_str());
						while (range1 <= range2)
							range[i++] = range1++;
						break;
					case ',':
						arg.replace(loc, 1, "%");
						temp = arg.substr(0, loc);
						range[i++] = atoi(temp.c_str());
						arg.erase(0, loc + 1);
						break;
					}
				}
			else
				{
				int loc = arg.find(",");
				temp = arg.substr(0, loc);
				range[i++] = atoi(temp.c_str());
				arg.erase(0, loc + 1);
				}
		else if (arg.find("-") < arg.length())
			{
			int loc = arg.find("-");
			temp = arg.substr(0, loc);
			range1 = atoi(temp.c_str());
			temp = arg.substr(loc + 1, arg.length() - loc - 1);
			range2 = atoi(temp.c_str());
			while (range1 <= range2)
				range[i++] = range1++;
			arg.erase(0, loc + 3);
			}
		else
			{
			range[i++] = atoi(arg.c_str());
			break;
			}
	//while ends here
	--i;
	
	
	cout << "Ranges entered:\n";
	for(int j = 0; j <= i; j++)
	  cout << range[j] << endl;
	  
	return 0;
	}	
	
#endif

//whew. That took me a long time. Anyway, thank God it's done. Feel free to try it out with various combinations, although I believe I've tried out pretty much every combination. Please do inform me of any bugs.