Random quotes

Splinter007 (8)
Hi everyone!

I have a question. I'm now making a program (in C++ ofcourse) which prints out some funny quotes on the screen, not very hard to make. But here comes the thing: I made the program so that it 'reads' a .txt file called 'quotes.txt'. In here are a few quotes I added so far. Works fine, but what I wanted to do next is that the program 'reads' the .txt file and the randomly chooses a quote (i.e. a random line in the .txt file since every quote starts on a new line). Unfortunatly I have absolutely no idea how to make something like that...

The code I have so far:

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// 'iQuote'
// '01 Main.cpp'

#include <iostream>
#include <fstream>
#include <string>

using namespace std;

char retry;

int quote()
{
	string line;
	ifstream quotefile ("quotes.txt");
	do
	{
		if (quotefile.is_open())
		{
			while (! quotefile.eof())
			{
				getline (quotefile,line);
				cout << line << endl;
			}
			quotefile.close();
		}
		else
		{
			cout << "ERROR #1: UNABLE TO OPEN FILE!" << endl;
			cout << "" << endl;
			cout << "Try again? Y = Retry, N = Quit" << endl;
			cin >> retry;
			cout << "" << endl;
		}
	}
	while (retry == 'y' || retry == 'Y');
	return 0;
}

int main()
{
	cout << "QQ QQ   Q QQQ  Q Q QQQ QQQ QQQ   QQ QQ	" << endl;
	cout << "QQ QQ     Q Q  Q Q Q Q  Q  Q     QQ QQ	" << endl;
	cout << " Q  Q   Q Q Q  Q Q Q Q  Q  Q      Q  Q	" << endl;
	cout << "Q  Q    Q Q Q  Q Q Q Q  Q  QQ    Q  Q	" << endl;
	cout << "        Q QQQ  Q Q Q Q  Q  Q			" << endl;
	cout << "        Q   QQ QQQ QQQ  Q  QQQ			" << endl;
	cout << "" << endl;
	cout << "If you haven't got anything clever to say at the moment, use these!" << endl; 
	cout << "Just repeat the sentence and anyone will instantly agree with you!" << endl;
	cout << "" << endl;
	quote();
	cout << "" << endl;
	return 0;
}


All it does now is print the content (quotes) from the .txt file on the screen.

Any help would be very pleased!
Last edited on
bluezor (298)
You can do this :

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#include <iostream>
#include <fstream>
#include <string>
#include <ctime>
#include <vector>

void quote()
{
    char retry = ' ';
    int lineCount = 0;
    int randomQuote_int = 0;
    std::string line = "";
    std::vector<std::string>randomQuote_vect;

    std::ifstream quoteFile ("quotes.txt");

    do
    {
        srand(time(0));
        if (quoteFile.is_open())
        {
            while (!quoteFile.eof())
            {
                getline(quoteFile, line);
                if (line != " ")
                {
                    randomQuote_vect.push_back(line);
                    lineCount++;
                }
            }
            randomQuote_int = rand() % lineCount;
            std::cout << randomQuote_vect[randomQuote_int] << std::endl;
            quoteFile.close();
        }
        else
        {
            std::cout << "Error. Unable to open file." << std::endl;
            std::cout << "Try again? [Y]es / [N]o" << std::endl;
        }
    } while (retry == 'Y' || retry == 'y');

}

int main()
{
        std::cout << "QQ QQ   Q QQQ  Q Q QQQ QQQ QQQ   QQ QQ	" << std::endl;
        std::cout << "QQ QQ     Q Q  Q Q Q Q  Q  Q     QQ QQ	" << std::endl;
	std::cout << " Q  Q   Q Q Q  Q Q Q Q  Q  Q      Q  Q	" << std::endl;
	std::cout << "Q  Q    Q Q Q  Q Q Q Q  Q  QQ    Q  Q	" << std::endl;
	std::cout << "        Q QQQ  Q Q Q Q  Q  Q			" << std::endl;
	std::cout << "        Q   QQ QQQ QQQ  Q  QQQ			" << std::endl;
	std::cout << "If you haven't got anything clever to say at the moment, use these!" << std::endl;
	std::cout << "Just repeat the sentence and anyone will instantly agree with you!" << std::endl;

	quote();

	return(0);
}


Put the lines into a vector then use a seeded random number generator to decide which quote to use.
Last edited on
Splinter007 (8)
Hi bluezor,

I bet it works, only it says that the function 'getline()' in line 24 is an undeclared identifier... Maybe it's just me (I still use the old Microsoft Visual C++ 6 which has (according to Vista) 'known compatability issues'. I'm installing the newer Visual C++ 2008 now.

Greets
bluezor (298)
That's funny.. You don't really need Microsoft Visual C++ really yet imo since it's much more complicated with more eye candy. I'd suggest you get a more beginner-friendly one like Dev-C++ or Code::Blocks (one i'm using).
firedraco (6243)
Actually, he forgot an std:: in front of getline() (it is part of the std namespace as well)
bluezor (298)
Actually, he forgot an std:: in front of getline() (it is part of the std namespace as well)
|

That might be it xD I don't think it needs a std:: in my one though (even though I don't use using namespace std.
firedraco (6243)
Well it does in mine (VC++).
Splinter007 (8)
Thanks alot! Works perfectly! This is what I was looking for, thanks a million!
Greets, Splinter007
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