User:Akrabbim/C++/guessinggame.cpp

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This is the text of a C++ source code, meant to have a ".cpp" file extension. To run the program, one will need a program to compile and link the code.

#include <iostream>
using namespace std;

void main()
{
        int Guess = 50;
        int Hi = 101;
        int Lo = 0;
        int Counter = 0;
        int Right = 0;
        char Answer;
        cout << "Think of a whole number between 0 and 100.\nTell me 'h' if I guess too high,";
        cout << " and 'l' if I guess too low.\nTell me 'r' when I get it right.\n";
        do
        {
                cout << "Is the number " << Guess << "?  ";
                cin >> Answer;
                switch(Answer)
                {
                        case 'h':
                         Hi = Hi - (Hi - Guess);
                         Guess = (Hi + Lo) / 2;
                         Counter++;
                         break;
                        case 'l':
                         Lo = (Guess - Lo) + Lo;
                         Guess = (Hi + Lo) / 2;
                         Counter++;
                         break;
                        case 'r':
                         Right = 1;
                         Counter++;
                         break;
                        default:
                         cout << "Invalid entry." << '\n';
                         break;
                }
        } while (Right == 0);
        cout << "Yes, I knew it was somewhere around that.\nIt took me " << Counter;
        cout << " guesses to get it right.  Thanks for playing!\n";
        cin.ignore();
}