How do I print the row and column number in an array????

This is a discussion on How do I print the row and column number in an array???? within the C Programming forums, part of the General Programming Boards category; I'm looking to modify my function for a 10 x 20 array that finds the max value in the array. ...

  1. #1
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    How do I print the row and column number in an array????

    I'm looking to modify my function for a 10 x 20 array that finds the max value in the array. I'm trying to print the row and column number of the element that is the max value but I always get 10 and 20 no matter where the max value is. Can someone help me figure out why or point me to another thread. I searched but couldn't find anything pertaining to this topic. I modified it for a smaller array until I get it figured out.

    Here's the code:

    #include <stdio.h>
    void findmax(int[2][20];
    int main()
    {
    int numbers[2][20] = {1,4,5,8,3,2,15,227,45,87,6,92,23,21,45,85,95,187, 34,67,56,4,2,7,0,9,6,78,94,300,486,867,917,45,1,66 6,911,56,41,35};

    findmax(numbers);
    return 0;
    }

    void findmax(int num[2][20])
    {
    int i,j,max;
    for(i=0;i<2;i++)
    for (j=0;j<20;j++)
    if (num[i][j] > max)
    max = num [i][j];
    printf("\nThe maximum array value is %d\n",max);
    return;
    }

  2. #2
    C++ Developer XSquared's Avatar
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    Use code tags.

    All you need to do is have ti store the row and column of the maximum value when you find it.
    Code:
    max = num [i][j];
    maxrow = i;
    maxcol = j;
    Naturally I didn't feel inspired enough to read all the links for you, since I already slaved away for long hours under a blistering sun pressing the search button after typing four whole words! - Quzah

    You. Fetch me my copy of the Wall Street Journal. You two, fight to the death - Stewie

  3. #3
    Registered User Draco's Avatar
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    all you'd have to do is after your first printf statement make another that uses i and j.
    Code:
    printf("Max found in array element [%d][%d]",i+1,j+1);

  4. #4
    C++ Developer XSquared's Avatar
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    Originally posted by Draco
    all you'd have to do is after your first printf statement make another that uses i and j.
    Code:
    printf("Max found in array element [%d][%d]",i+1,j+1);
    That wouldn't work, because i and j are out of scope by then.
    Naturally I didn't feel inspired enough to read all the links for you, since I already slaved away for long hours under a blistering sun pressing the search button after typing four whole words! - Quzah

    You. Fetch me my copy of the Wall Street Journal. You two, fight to the death - Stewie

  5. #5
    Registered User Draco's Avatar
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    I don't see why he couldn't put that statement in the findmax function

  6. #6
    C++ Developer XSquared's Avatar
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    Here's the code indented properly:
    Code:
    #include <stdio.h>
    void findmax(int[2][20];
    int main()
    {
      int numbers[2][20] = {1,4,5,8,3,2,15,227,45,87,6,92,23,21,45,85,95,187,
    			34,67,56,4,2,7,0,9,6,78,94,300,486,867,917,45,1,66
    			6,911,56,41,35};
    
      findmax(numbers);
      return 0;
    }
    
    void findmax(int num[2][20])
    {
      int i,j,max;
      for(i=0;i<2;i++)
        for (j=0;j<20;j++)
          if (num[i][j] > max)
    	max = num [i][j];
      printf("\nThe maximum array value is %d\n",max);
      return;
    }
    Now do you see why it wouldn't work?
    Naturally I didn't feel inspired enough to read all the links for you, since I already slaved away for long hours under a blistering sun pressing the search button after typing four whole words! - Quzah

    You. Fetch me my copy of the Wall Street Journal. You two, fight to the death - Stewie

  7. #7
    Registered User Draco's Avatar
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    yeah. It's confusing when they don't put in loop braces....I didn't even know you could do that.

  8. #8
    C++ Developer XSquared's Avatar
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    If you don't use braces, it will only include the next line of code in the loop/if statement/whatever.
    Naturally I didn't feel inspired enough to read all the links for you, since I already slaved away for long hours under a blistering sun pressing the search button after typing four whole words! - Quzah

    You. Fetch me my copy of the Wall Street Journal. You two, fight to the death - Stewie

  9. #9
    Registered User Draco's Avatar
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    I know that..but I thought for loops needed them.

  10. #10
    C++ Developer XSquared's Avatar
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    Nope.
    Naturally I didn't feel inspired enough to read all the links for you, since I already slaved away for long hours under a blistering sun pressing the search button after typing four whole words! - Quzah

    You. Fetch me my copy of the Wall Street Journal. You two, fight to the death - Stewie

  11. #11
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    Thanks for the help Xsquared.

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