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I need help with a random number generator program.

This is a discussion on I need help with a random number generator program. within the C++ Programming forums, part of the General Programming Boards category; I am trying to write a simple program that picks a number between 1 and 100, and then lets the ...

  1. #1
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    I need help with a random number generator program.

    I am trying to write a simple program that picks a number between 1 and 100, and then lets the user guess what the number is. The program should tell the user if their guess is to high, to low, or correct.

    The problem I am having a problem with the program I wrote. Every time I input a number it tells me I am correct even if that number is larger than 100.

    I don't what the problem is. Could someone please help.

    Code:
    #include <iostream>
    #include <cstdlib>
    #include <ctime>
    
    
    using namespace std;
    
    
    int rand_range(int low, int high)
    {
        return rand() % (high - low + 1 )+low;
    }
    int main()
    {   int input;
        srand(time(NULL));
        rand_range(1,100);
    
    
        cout << "pick a number between 1 and 100 \n";
        cin >> input;
    
    
        if(input=rand_range(1,100))
        {
            cout << "correct!\n";
        }
        else if( input != rand_range(1,100))
        {
            cout<< "wrong!\n";
        }
    randexample.cpp

  2. #2
    and the Hat of Guessing tabstop's Avatar
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    The difference between "=" and "==" rears its ugly head yet again.

  3. #3
    Registered User
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    2,053
    You're also calling rand_range too many times. You should only call it once.
    It is too clear and so it is hard to see.
    A dunce once searched for fire with a lighted lantern.
    Had he known what fire was,
    He could have cooked his rice much sooner.

  4. #4
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    <random>
    Code:
    std::default_random_engine generator;
    std::uniform_int_distribution<int> distribution(1,6);
    int dice_roll = distribution(generator);  // generates number in the range 1..6
    If you would like to know others ways to produce random numbers take a look at: <random> - C++ Reference

    There is a whole library on random number generation, check it out.
    King Mir likes this.

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