Random Number Issues

This is a discussion on Random Number Issues within the C Programming forums, part of the General Programming Boards category; I am very new to C and have been tasked to produce a program that generates 1000 random numbers (with ...

  1. #1
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    Question Random Number Issues

    I am very new to C and have been tasked to produce a program that generates 1000 random numbers (with a max of 9) and then finds the total average. I have produced the following but it only seems to return 0 as the answer.

    Code:
    // Program to determine the mean of 1000 random numbers //
    // written by Kerim Morris 01/10/2010 //
    
    
    #include <stdlib.h>
    
    int max_count = 1000;         //declare the variables//
    int count = 0;
    int random_number = 0;
    int random = 0;
    int random_total = 0;
    float mean = 0;
    
    
    main()                       //start of main function//
    {
    {
                                 
    for (count = 0; count < max_count; count ++);   //loop counter to a maximum// 
                                                                       //of 1000 //
    
    random_number = (int)(10.0*rand()/(RAND_MAX+1.0));      //produce random//
                                                                              // numbers between 0-9//
    
    
    random_total = random_number + random_total;        //calculate the running //
                                                                              // total//
    }
                mean = (random_total / max_count);           //calculate mean of total //
                printf("The mean of 1000 random numbers equals %f");
               
                
    }
    Any guidance would be appreciated.

  2. #2
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    Code:
    for (count = 0; count < max_count; count ++);   //loop counter to a maximum//

  3. #3
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    I'm not quite sure what you mean, you seem to have repeated the same code I have but unfortunately there is no explanation.

  4. #4
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    Yeah I think his blue semi-colon where there shouldn't be a semi-colon isn't that visible.
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  5. #5
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    Code:
    for (count = 0; count < max_count; count ++);   //loop counter to a maximum//
    There, that's a bit more obvious I think. At least when you've figured out that upside down, slightly off, italic exclemation point is in fact a semicolon.

  6. #6
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    1) The semicolon isn't supposed to be there is their way of saying...
    Put opening brace instead.
    2) Also you have en extra opening-brace after main (one too many).
    3) This is incorrect:
    Code:
    mean = (random_total / max_count);
    . You need to do
    Code:
    mean = ((float)random_total / max_count);
    4) You need to fix your printf so that ot outputs mean.

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