lots of stuff

[assignments.git] / lab / lab7 / matrix.c

#include "matrix.h"
#include <string.h>
#include <stdio.h>

const int gLeft[MATRIX_SIZE][MATRIX_SIZE];
const int gRight[MATRIX_SIZE][MATRIX_SIZE];

void set_left(int matrix[MATRIX_SIZE][MATRIX_SIZE])
{
   memcpy(gLeft, matrix, MATRIX_SIZE * MATRIX_SIZE * sizeof(int));
   return;
}

void set_right(int matrix[MATRIX_SIZE][MATRIX_SIZE])
{
   memcpy(gRight, matrix, MATRIX_SIZE * MATRIX_SIZE * sizeof(int));
   return;
}

int matrix_multiply(int row, int col)
{
   int sum = 0;
   int i = 0;
   for(i = 0; i < MATRIX_SIZE; ++i)
   {
      sum += (gLeft[row][i] * gRight[i][col]);
   }
   if (((row + col) % 10) == 0)
   {
      sleep(rand() % 3);
   }
   return sum;
}

void print_matrix(int matrix[MATRIX_SIZE][MATRIX_SIZE])
{
   int row, col;
   for(row = 0; row < MATRIX_SIZE; ++row)
   {
      for(col = 0; col < MATRIX_SIZE; ++col)
      {
         printf("%d,", matrix[row][col]);
      }
      printf("\n");
   }
   return;
}