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short matrix problem

This is a discussion on short matrix problem within the C Programming forums, part of the General Programming Boards category; In this program I only input the number of columns and the entries of the matrix. The program then determines ...

  1. #1
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    short matrix problem

    In this program I only input the number of columns and the entries of the matrix. The program then determines the number of rows. The program works perfectly for the correct number of entries like 4 entries for a 2 by 2 matrix. However it doesnt work for 3 entries for a 2 by 2 matrix. Please reply fast
    Code:
     
    Code:
    #include<stdio.h>
    #include<stdlib.h>
    
    
    int  main()
    {
      int m,x, n, c = 0, d,k, matrix[10][10], transpose[10][10], product[10][10];
    
    
      printf("Enter the number of columns of matrix ");
      scanf("%d",&m);
      if(m<=0){
        printf("You entered a invalid value.");
        exit(0);
      }
      else{
        printf("Enter the elements of matrix \n");
    
    
        for( c = 0 ; c < 10 ; c++ )
          {
            for( d = 0 ; d < m ; d++ )
              {
                scanf("%d",&matrix[c][d]);
                if (matrix[c][d] == 99) // 99 is  variable I declared to use as a break
               break;
    
    
    
    
              }
            if (matrix[c][d] == 99)
              break;
          }
      }
    
    
      printf("\nHere is your matrix:\n");
      int i;
    
    
      for(i=0;i<c;i++)
        {
          for(d=0;d<m;d++)
            {
    
    
     printf("%3d ",matrix[i][d]);
            }
    printf("\n");
        }

  2. #2
    C++ Witch laserlight's Avatar
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    Quote Originally Posted by kiwi101
    Please reply fast
    fast

    (If I wanted to be nasty, I would have let my reply stop here, but I'll be kind. Next time, don't insist that people "reply fast".)

    Quote Originally Posted by kiwi101
    However it doesnt work for 3 entries for a 2 by 2 matrix.
    How does it not work? Also, you should indent your code properly to make it easier to read.
    Adak and AndiPersti like this.
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  3. #3
    Registered User TheBigH's Avatar
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    Do you want an m x m, or a 10 x m matrix?
    Code:
    while(!asleep) {
       sheep++;
    }

  4. #4
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    u miss fflush()... u need to clear ur buffer rite after input from user else ur next scanf will still take ur previous entered number as input(in the case that next scanf very close together)


    question for u: are u on a open book test or something?

  5. #5
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    sorry
    i was just getting tensed since ive bin working on this for ages and i cant get any ideas

    it does work if i put 3 entries but not the way it shoud like itll give me garbage values.

  6. #6
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    no im not i just have this due in a couple of hours.

    Could u elaborate? ive neve rused fflush

  7. #7
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    Okay I have an idea I just dont know how to quite put it down. If the user doesnt enter m*n entries then the program should just exit
    kindof like this
    Code:
     if(m*c%m != 0){
                printf("NO");
                exit(0);
              }
                else{
    print

  8. #8
    - - - - - - - - oogabooga's Avatar
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    Why haven't you answered laserlight's or TheBigH's questions?

    Neko Tan doesn't know what it's talking about. fflush is not needed.

    Indent your code properly. Look at post #7. Is that really how you mean your code to look?
    The cost of software maintenance increases with the square of the programmer's creativity. - Robert D. Bliss

  9. #9
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    I did reply to laserlight.
    Look im just trying to brainstorm i want the matrix to be a m*n matrix.
    i want my code to exit if the user doesnt enter m*n values.
    Could you please give me some direction?
    Im waitng here

  10. #10
    - - - - - - - - oogabooga's Avatar
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    If it's supposed to be m x n why don't you set n to anything? You're not even using it.
    The cost of software maintenance increases with the square of the programmer's creativity. - Robert D. Bliss

  11. #11
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    m = # of rows
    in this program my # of rows is called c

    n= # of columns
    in this program my # of colums is called m

    so a c*m matrix

  12. #12
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    Could you guys please not make fun of me and help me plz

  13. #13
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    Yes, I see your stressed out, so I deleted my funny post.

    Quickly, what's the problem?

  14. #14
    - - - - - - - - oogabooga's Avatar
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    Your variable names are terrible. Why is n called m and m called c???

    Anyway, I think I'm beginning to understand what you're up to here. You want the user to enter the number of columns (but NOT the number of rows). Then the user inputs rows of data until they decide to stop by entering the number 99.

    Is that correct?

    Can you show an exact example of what doesn't work?
    The cost of software maintenance increases with the square of the programmer's creativity. - Robert D. Bliss

  15. #15
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    Thanks
    let me explain it with an example please tell me if you get it
    when the user enters 2 as the # of columns. And then enter 1,2,3,4 as the input. The program automatically displays a 2 by 2 matrix with 1,2,3,4 entries. However my problem is that if that same user accidentally only entered 1,2,3 then I want the program to exit using the exit function. But I don't know how to write it properly could you please tell me how i should write it.

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