Thread: Any help on making random char code?

  1. #1
    Registered User
    Join Date
    Jan 2003

    Any help on making random char code?

    I need to create a random code that uses "abcde" and that does not repeat any letters, but I have no idea how to do that, I know how to make random numbers, but not chars, any help?
    This is what I need them for:
    #include <iostream>
    #include <cstring>
    #include <ctime>
    using namespace std;
    int main()
    	char code[6] = "abcde";  // here I want the ranom code
    	char icode[6];
    	char letter;
    	char opcion;
    	bool playagain = false;
    	int i = 0;
    	int correct = 0;
    		cout << "\t\t*RULES*\n\n";
    		cout << "1.- You do NOT speak about Fight Club.... lol.\n";
    		cout << "2.- You do NOT write in CAPS.\n";
    		cout << "3.- You do NOT write more than 5 lettrrs per guess.\n\n\n";
    		cout << "Try to guess a code I have thought of:\n";
    			icode[5] = '\0';
    			for (i = 0; i < 5; i++)
    				cin >> letter;
    				icode[i] = letter;
    				if (icode[i] == code[i])
    			cout << "You had " << correct << " correct letters!\n";
    			if (!strcmp(code, icode))
    				cout << "You guessed the code!\n";
    			correct = 0;
    		} while (strcmp(code, icode));
    		cout << "Do you want to play again? (y/n)\n";
    		cin >> opcion;
    		playagain = (opcion == 'y' ? true : false);
    	} while (playagain);
    	return 0;
    Why drink and drive when you can smoke and fly?

  2. #2
    Confused Magos's Avatar
    Join Date
    Sep 2001
    Random characters are the same as random numbers, you just have to specify a starting number:

    A - Z : 65 - 90
    a - z : 97 - 122

    Random letter A, B or C

    ((rand() % 3) + 65)

    Random letter d, e, f, g or h

    ((rand() % 5) + 97 + 3)

    The problem will be not to repeat any letters. You could generate a letter, check if it is already picked (storing the picked one in an array) and if it already exists, pick a new one.

    Another solution would be to place all available letters in an array, then do random swaps several times to get them in a random order (generate two random indices, then swap the letters at those two positions in the array).
    Last edited by Magos; 02-02-2003 at 12:14 PM.

    Give a man a fish and you feed him for a day.
    Teach a man to fish and you feed him for a lifetime.

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