C program: Median and Mode of array

This is a discussion on C program: Median and Mode of array within the C Programming forums, part of the General Programming Boards category; I have randomized an array of 1000 to fill with numbers 10-50. I need to find the median and mode. ...

  1. #1
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    C program: Median and Mode of array

    I have randomized an array of 1000 to fill with numbers 10-50. I need to find the median and mode. Since it was randomized I know i need to sort the array then find the median and mode, yet im unsure how to do that, please help.

    This is what i have so far...
    Code:
    #include <stdio.h>
    #include <stdlib.h>
    
    int main ()
    {
    int mainArray[1000];
    int size = 1000;
    int currPos = 0;
    int randNumber = 0;
    srand(20);
    
    for (currPos = 0; currPos < 1000; currPos++)
    {
    mainArray[ currPos ] = rand()%41+10;
    }
    
    }
    This is what I have for the sort so far but it isnt sorting them...

    Code:
        int i;
        int n;
        int num1, num2;
        
        for (i = (size - 1); i > 0; i--)
        {
            for (n = 1; n <= i; n++)
            {
                
                if (mainArray[(n-1)] > mainArray[n]) 
                {
                    
                    num1 = n-1;
                    num2 = n;
                    
                }
            }
        }
    Last edited by djay86753; 04-17-2012 at 09:43 AM.

  2. #2
    Registered User claudiu's Avatar
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    You already have another thread on this. Opening 1000 threads will not get you help any faster, it will just annoy the hell out of people because they have to cross reference their answers.
    1. Get rid of gets(). Never ever ever use it again. Replace it with fgets() and use that instead.
    2. Get rid of void main and replace it with int main(void) and return 0 at the end of the function.
    3. Get rid of conio.h and other antiquated DOS crap headers.
    4. Don't cast the return value of malloc, even if you always always always make sure that stdlib.h is included.

  3. #3
    - - - - - - - - oogabooga's Avatar
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    Are you planning to write your own sort (if so, do so and post back), or are can you use qsort()?

    And your code really sucks. Bad variable names, unused variables, bad spacing. Put in some effort man!
    The cost of software maintenance increases with the square of the programmer's creativity. - Robert D. Bliss

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    This is what I have for the sort so far but it isnt sorting them properly...

    Code:
        int i;
        int n;
        int num1, num2;
        
        for (i = (size - 1); i > 0; i--)
        {
            for (n = 1; n <= i; n++)
            {
                
                if (mainArray[(n-1)] > mainArray[n]) 
                {
                    
                    num1 = n-1;
                    num2 = n;
                    
                }
            }
        }

  5. #5
    C++ Witch laserlight's Avatar
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    Are you also djay86?
    C + C++ Compiler: MinGW port of GCC
    Version Control System: Bazaar

    Look up a C++ Reference and learn How To Ask Questions The Smart Way

  6. #6
    Registered User camel-man's Avatar
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    Break it down slowly what you are trying to do... Right now you are saying if mainArray[n-1] is greater than mainArray[n] then you want to put n-1 into num1, then n into num2... But you never reference the array your just moving normal variables around.

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    no idk who that is but they are obviously copying my stuff, but i dont really care either way

  8. #8
    - - - - - - - - oogabooga's Avatar
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    Quote Originally Posted by djay86753 View Post
    This is what I have for the sort so far but it isnt sorting them properly...

    Code:
        int i;
        int n;
        int num1, num2;
        
        for (i = (size - 1); i > 0; i--)
        {
            for (n = 1; n <= i; n++)
            {
                
                if (mainArray[(n-1)] > mainArray[n]) 
                {
                    
                    num1 = n-1;
                    num2 = n;
                    
                }
            }
        }
    That's just ridiculous. You clearly have absolutely no idea what you're doing. If this is not a joke and you don't want to fail your class, then look up a simple sorting algorithm (e.g., selection sort) and implement it carefully and thoughtfully.
    The cost of software maintenance increases with the square of the programmer's creativity. - Robert D. Bliss

  9. #9
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    you have all been so helpful. thanks!

  10. #10
    Registered User claudiu's Avatar
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    Oh, we are so sorry we couldn't do your homework djay, would you like a milkshake ? Get off your sorry behind and put some effort into it damnit. Work, Google, compile, test, post questions not ridiculous garbage you magically crafted in your ........ editor.
    1. Get rid of gets(). Never ever ever use it again. Replace it with fgets() and use that instead.
    2. Get rid of void main and replace it with int main(void) and return 0 at the end of the function.
    3. Get rid of conio.h and other antiquated DOS crap headers.
    4. Don't cast the return value of malloc, even if you always always always make sure that stdlib.h is included.

  11. #11
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    someones a little angry. thank you, have a good day

  12. #12
    Registered User claudiu's Avatar
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    You are welcome, good luck finding someone here that will hand out the code to you.
    1. Get rid of gets(). Never ever ever use it again. Replace it with fgets() and use that instead.
    2. Get rid of void main and replace it with int main(void) and return 0 at the end of the function.
    3. Get rid of conio.h and other antiquated DOS crap headers.
    4. Don't cast the return value of malloc, even if you always always always make sure that stdlib.h is included.

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