simple stuff

This is a discussion on simple stuff within the C Programming forums, part of the General Programming Boards category; I'm trying to get this program to multiply two vectors and return the result c[2][2]. I think I have most ...

  1. #1
    Noah
    Guest

    simple stuff

    I'm trying to get this program to multiply two vectors and return the result c[2][2]. I think I have most of this correct, it looks like just my out put that is not making sense. I'm trying to get it to display something like
    2 3
    4 5


    Any help?
    Thanks

    Here's the source
    #include <stdio.h>
    #include <math.h>

    float multi(float a[2][2], float b[2][2], float c[2][2])
    {
    int i,j;
    for (i=0;i<2;i++)
    for (j=0;j<2;j++)
    c[i][j]=a[i][j]+b[i][j];
    }
    main()
    {
    int i,j;
    float *pc[2][2];
    float a[2][2]={{5,6},{8,2}}, b[2][2]={{5,7},{3,5}};
    float c[2][2];


    multi(a,b,c);
    for (i=0; i<2; i++)
    for (j=0; j<2; j++)

    printf("%f %f \n", c[2][2]);


    return 0;
    }

  2. #2
    and the hat of wrongness Salem's Avatar
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    Try
    Code:
    for (i=0; i<2; i++)
        printf("%f  %f \n", c[i][0], c[i][1] );
    > float *pc[2][2];
    This is redundant
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
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