Category : Files from Magazines
Archive   : CUJ9309.ZIP
Filename : 1109080B

 
Output of file : 1109080B contained in archive : CUJ9309.ZIP
#include
#include
#include "fixed.h"


void main( void )
{
// create a bunch of Fixed arrays
Fixed array1[3][3];
Fixed array2[3][3];
Fixed result[3][3];
Fixed temp,zero_value;

// Initialize them
array1[0][0] = array1[1][1] = array1[2][2] = 1;
array2[0][0] = array2[1][1] = array2[2][2] = 1;


array1[0][0] = 1;
array1[0][1] = 3;
array1[0][2] = -4;

array1[1][0] = 1;
array1[1][1] = 1;
array1[1][2] = -2;

array1[2][0] = -1;
array1[2][1] = -2;
array1[2][2] = 5;



array2[0][0] = 8;
array2[1][0] = 3;
array2[2][0] = 0;

array2[0][1] = 3;
array2[1][1] = 10;
array2[2][1] = 2;

array2[0][2] = 0;
array2[1][2] = 2;
array2[2][2] = 6;

zero_value = 0;


// perform a simple matrix multiplication

for ( unsigned z = 0 ; z < 100000 ; z ++)
{ // matrix multiply

for (int i = 0 ; i < 3 ; i++)
{
for ( int j = 0 ; j < 3 ; j++)
{
temp = zero_value;
for ( int k = 0 ; k < 3 ; k++)
{
// the slow, temporary producing version
// temp = temp + array1[i][k] * array2[k][j];

// the much faster, specialized function
temp.addProduct(array1[i][k],array2[k][j]);
}
result[i][j] = temp;
}
}
}


{ // print matrix results

cout << "\n";

for ( int i = 0 ; i < 3 ; i++)
{
cout << "| " << array1[i][0] << " "
<< array1[i][1] << " "
<< array1[i][2] << " |";
cout << "| " << array2[i][0] << " "
<< array2[i][1] << " "
<< array2[i][2] << " |";
cout << " | " << result[i][0] << " "
<< result[i][1] << " "
<< result[i][2] << " |";

cout << "\n";
}

}
}


  3 Responses to “Category : Files from Magazines
Archive   : CUJ9309.ZIP
Filename : 1109080B

  1. Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!

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