Thread: help with rand

  1. #1
    Pokemon Master digdug4life's Avatar
    Join Date
    Jan 2005
    Mystic Island, NJ

    Question help with rand

    Hey, I'm back. YOu were right, Java is good for a while, but i ahd to come back to C++. anyway, I've tried to write a program that chooses a number, and the user has to guess it. I also want it to display the number of guess when the user is correct. I kind of forget what im doing, but this is what I have:

    #include <iostream>
    #include <cstdlib>
    using namespace std;
    int main()
        char ans;
        do {
            int fav = std::rand() % 10;
            int num;
            int guess = 1;
            do { 
                 std::cout << "Pick a number from 1 to 10\n";
                 std::cin >> num;
                  if(num != fav){ ++guess;
                  std::cout << (num < fav ? "Low" :
                               num > fav ? "High"  :
                                   "You are Correct!\a\n It took you"
                                         std::cout << guess<< "Guesses")
                          << std::endl;
                          }while (num != fav);
                          std::cout << "Try again? y/n";
                          std::cin >> ans;
                          }while (ans == 'y');
                 return 0;
    Verbal Irony >>

    "I love english homework!" When really nobody like english homework.
    -Mrs. Jennifer Lenz (English Teacher)

  2. #2
    Registered User
    Join Date
    Oct 2004
    I think you want to use srand as well to seed the random number generator.

  3. #3
    Registered User
    Join Date
    Oct 2001
    > int fav = std::rand() % 10;
    And if you want a number from 1 to 10, then make this:
    int fav = std::rand() % 10 + 1;

  4. #4
    Senior Member joshdick's Avatar
    Join Date
    Nov 2002
    Phildelphia, PA
    If you have the line
    using namespace std;
    in your code, then you don't need to preface cin and cout with std::

    Don't you the ternary operator for nested ifs. It makes your code incredibly unreadable.

  5. #5
    Let's do some coding! Welshy's Avatar
    Join Date
    Mar 2005
    Staffordshire University, UK
    I also recommend you pair up your braces
    The code is a lot easier to read if the opening and closing braces of the same scope are lined up with each other.

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