package gunes_ozkan_hw1; import java.util.Random; /** * * @author user */ public class cMatrix { private long [][] elements; private int row; private int col; /** * @param args the command line arguments */ public static void main(String[] args) { // TODO code application logic here cMatrix m1 = new cMatrix(); m1.AssignRandom(); m1.printMatrix(); System.out.println(""); m1.printMatrixWithPrime(); cMatrix m2 = new cMatrix(10,20); m2.AssignRandom(); cMatrix m3 = new cMatrix(20,10); m3.AssignRandom(); cMatrix m4 = new cMatrix(); m4 = m2.multiplyMatrices(m3); m4.printMatrix(); } public cMatrix(){ row = 10; col = 10; elements = new long [row][col]; } public cMatrix(int row, int col){ this.row = row; this.col = col; elements = new long [row][col]; } public void AssignRandom(){ Random randomNum = new Random(); for (int i = 0; i < row; i++){ for (int j = 0; j < col; j++){ long s; s = randomNum.nextLong(10000); elements[i][j] = s; } } } public void printMatrix(){ for (int i = 0; i < row; i++){ for (int j = 0; j < col; j++){ System.out.print(elements[i][j] + " "); } System.out.println(" "); } } /** * * @param sayi * @return */ public static boolean isPrime(long sayi){ boolean sonuc = true; for (int i = 2; i < sayi; i++){ if(sayi % i == 0){ sonuc = false; break; } } return sonuc; } public void printMatrixWithPrime(){ for (int i = 0; i < row; i++){ for (int j = 0; j < col; j++){ if(isPrime(elements[i][j])){ System.out.print(elements[i][j] + "* "); } else { System.out.print(elements[i][j] + " "); } } System.out.println(" "); } } /** * * @param Multiplicand * @return */ public cMatrix multiplyMatrices(cMatrix Multiplicand){ long sum = 0; int row2 = row; int col2 = col; Multiplicand.elements = new long [row2][col2]; for (int i = 0; i < row2; i++){ for (int j = 0; j < col2; j++){ for (int k = 0; k < row; k++){ sum = sum + elements[i][k] * elements[k][j]; } Multiplicand.elements[i][j] = sum; sum = 0; } } return Multiplicand; } /** * @return the elements */ public long[][] getElements() { return elements; } /** * @param elements the elements to set */ public void setElements(long[][] elements) { this.elements = elements; } /** * @return the row */ public int getRow() { return row; } /** * @param row the row to set */ public void setRow(int row) { this.row = row; } /** * @return the col */ public int getCol() { return col; } /** * @param col the col to set */ public void setCol(int col) { this.col = col; } }

cMatrix_2