using getline in C++

<3

code

#include "Hashtable.h"
#include <string>
#include <fstream>
#include <sstream>
#include <iostream>

using namespace std;

int main(int argc, char* argv[])
{
	if(argc != 2)
	{
		cout << "Invalid usage ./dictionary <inputfile>" << endl;
		return 0;
	}

	ifstream input;
	input.open(argv[1]);

	if(!input.is_open())
	{
		cout << "Unable to open the input file" << endl;
		return 0;
	}

	int num = 0;
	input >> num;

	Hashtable dictionary(num*2);

	if(!dictionary.FillFromFile(input))
	{
		cout << "Error filling from file" << endl;
		return 0;
	}

	string phrase;
	string notfound[200];
	int count;
	string temp;
	string word;
	int dummy = 0;

	while(dummy == 0)
	{
		cout << "Enter a phrase ('quit' to quit): ";
		getline(cin, phrase);

		if(phrase == "quit")
			break;

		count = 0;
		istringstream iss(phrase);
		while(iss >> word)
		{	
			temp = dictionary.Search(word);
			if(temp != "")
			{
				cout << temp << " ";
			}
			else
			{
				notfound[count] = word;
				cout << "*" << notfound[count] << "*" << " ";
				++count;
			}
		}
		cout << endl;
		
		char yn;
		for(int i = 0; i < count; i++)
		{
			do
			{
				cout << "The word '"<< notfound[i] << "' is not in the dictionary. Do you wish to add it? (y/n): ";
				cin >> yn;

				if(yn != 'y' && yn != 'n')
					cout << "Not a valid input. y/n only." << endl;
			}
			while(yn != 'y' && yn != 'n');

			if(yn == 'y')
			{
				string spanish;
				cout << "Enter the Spanish definition of '" << notfound[i] << "': ";
				getline(cin, spanish);
				dictionary.Insert(notfound[i], spanish);
			}
		}
	}

	return 1;
}

output

Enter a phrase ('quit' to quit): do you speak spanish
hacer tu hablar *spanish* 
The word 'spanish' is not in the dictionary. Do you wish to add it? (y/n): y
Enter the Spanish definition of 'spanish': Enter a phrase ('quit' to quit):

As you can see, the second getline where I take in the definition of the word is skipped for some reason.

ps, I know "do you speak spanish" != "hacer tu hablar espanol" but we are just translating it word for word.

Bob Sapp

You need to flush the input buffer because it has a \n character in it after you enter the 'y' or 'n'. Unfortunately I can't remember how to do that. This is a common problem, I'm guessing a google search will help.

Edit: a quick google search reveals that cin.ignore() is the function you want to use: http://www.cppreference.com/cppio/ignore.html

<3

H5

It works.

Thanks.