package ru kpfu itis group11402 batyrova Task055 import ru kpfu itis g

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package ru.kpfu.itis.group11402.batyrova.Task055;
import ru.kpfu.itis.group11402.batyrova.Task050.RationalFraction;
import ru.kpfu.itis.group11402.batyrova.Task053.RationalVector2D;
/**
* @author Elvira Batyrova
* 402
* 055
*/
public class RationalMatrix2x2 {
private RationalFraction[][]matrix = new RationalFraction[2][2];
public RationalFraction[][] getMatrix() {
return matrix;
}
public void setMatrix(RationalFraction[][] matrix) {
this.matrix = matrix;
}
public RationalMatrix2x2() {
this(new RationalFraction[][] {{new RationalFraction(),new RationalFraction()},{new RationalFraction(),new RationalFraction()}});
}
public RationalMatrix2x2(RationalFraction r) {
this(new RationalFraction[][] {{r,r},{r,r}});
}
public RationalMatrix2x2(RationalFraction[][] matrix) {
this.matrix = matrix;
}
public RationalMatrix2x2(RationalFraction a1, RationalFraction a2, RationalFraction a3, RationalFraction a4) {
this(new RationalFraction[][] {{a1,a2},{a3,a4}});
}
public RationalMatrix2x2 add(RationalMatrix2x2 rmatr) {
RationalMatrix2x2 result = new RationalMatrix2x2();
for (int i = 0; i < 2; i++) {
for (int j = 0; j < 2; j++) {
result.matrix[i][j] = this.matrix[i][j].add(rmatr.getMatrix()[i][j]);
}
}
return result;
}
public RationalMatrix2x2 mult(RationalMatrix2x2 rmatr) {
RationalMatrix2x2 result = new RationalMatrix2x2();
for (int i = 0; i < 2; i++) {
for (int j = 0; j < 2; j++) {
for (int k = 0; k < 2; k++) {
result.matrix[i][j] += this.matrix[i][k].mult(rmatr.getMatrix()[k][j]);
}
}
}
return result;
}
public RationalFraction det() {
return matrix[0][0].mult(matrix[1][1]).sub(matrix[0][1].mult(matrix[1][0]));
}