lab/lab7/matrix.c

   1 #include "matrix.h"
   2 #include <string.h>
   3 #include <stdio.h>
   4
   5 const int gLeft[MATRIX_SIZE][MATRIX_SIZE];
   6 const int gRight[MATRIX_SIZE][MATRIX_SIZE];
   7
   8 void set_left(int matrix[MATRIX_SIZE][MATRIX_SIZE])
   9 {
  10    memcpy(gLeft, matrix, MATRIX_SIZE * MATRIX_SIZE * sizeof(int));
  11    return;
  12 }
  13
  14 void set_right(int matrix[MATRIX_SIZE][MATRIX_SIZE])
  15 {
  16    memcpy(gRight, matrix, MATRIX_SIZE * MATRIX_SIZE * sizeof(int));
  17    return;
  18 }
  19
  20 int matrix_multiply(int row, int col)
  21 {
  22    int sum = 0;
  23    int i = 0;
  24    for(i = 0; i < MATRIX_SIZE; ++i)
  25    {
  26       sum += (gLeft[row][i] * gRight[i][col]);
  27    }
  28    if (((row + col) % 10) == 0)
  29    {
  30       sleep(rand() % 3);
  31    }
  32    return sum;
  33 }
  34
  35 void print_matrix(int matrix[MATRIX_SIZE][MATRIX_SIZE])
  36 {
  37    int row, col;
  38    for(row = 0; row < MATRIX_SIZE; ++row)
  39    {
  40       for(col = 0; col < MATRIX_SIZE; ++col)
  41       {
  42          printf("%d,", matrix[row][col]);
  43       }
  44       printf("\n");
  45    }
  46    return;
  47 }
  48