Help! Getting identical random numbers?

This is a discussion on Help! Getting identical random numbers? within the C++ Programming forums, part of the General Programming Boards category; In my program I'm getting the same random numbers. I've set the seed with the system time. I can't figure ...

  1. #1
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    Help! Getting identical random numbers?

    In my program I'm getting the same random numbers. I've set the seed with the system time. I can't figure out the problem. Somebody help?

    ------------------------------------------------------------------------------------

    #include <iostream.h>
    #include <stdlib.h>
    #include <time.h>
    #include <iomanip.h>

    void main ()
    {
    int how_many, max, array[40000], count=0, count2, row;

    // Opening Statements

    cout<<"How many numbers? ";
    cin>>how_many;
    while (how_many>40000 || how_many<1)
    {
    cout<<"Please enter a number between 1 and 40000: ";
    cin>>how_many;
    }

    cout<<"How big are the numbers? ";
    cin>>max;

    //Generate random numbers

    for (count=0; count<how_many; count++)
    { srand(time(NULL));
    array[count]=rand() % max + 1;
    }

    row=how_many/10;
    count2=0;

    for (count=0; count<how_many; count++)
    { cout<<array[count]<<setw(7);

    }


    }

  2. #2
    Registered User C_Coder's Avatar
    Join Date
    Oct 2001
    Posts
    523
    Well srand should only be called once, so put it before your loop.
    and it should be int main not void main

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