Si quieres algún otro código solo comentalo y lo resolvemos.
/*
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*/
package matrizinversa;
import static java.lang.Math.pow;
import java.util.Scanner;
/**
*
* @author Sleiner
*/
public class MATRIZINVERSA {
/**
* @param args the command line arguments
*/
public static Scanner scan = new Scanner(System.in).useDelimiter("\n");
public static int t;
public static double[][] m = new double[t][t];
public static double[][] mi = new double[t][t];
public static double[][] inversa= new double[t][t];
public static void main(String[] args) {
// TODO code application logic here
int band;
t = fun_leerNumero("Ingrse el tamaño de las dimensiones de la matriz: ");
m = fun_leerMatriz();
inversa = fun_llenarMatriz();
sub_mostrar("Original", m);
mi = m;
fun_matrizInversa();
band = fun_comprobar();
if (band == 1) {
System.out.println("La matriz no tiene inversa");
} else {
sub_mostrar("Inversa", inversa);
sub_mostrar("Comprobacion", mi);
}
}
public static int fun_leerNumero(String mensaje) {
int num;
do {
System.out.println(mensaje);
num = scan.nextInt();
} while (num < 2);
return num;
}
public static double[][] fun_leerMatriz() {
double[][] matAux = new double[t][t];
System.out.println("Ingrese los datos de la matriz: ");
for (int i = 0; i < t; i++) {
for (int j = 0; j < t; j++) {
System.out.println("Ingrese el dato: ");
matAux[i][j] = scan.nextInt();
}
}
return matAux;
}
public static double[][] fun_llenarMatriz() {
double[][] matAux = new double[t][t];
for (int i = 0; i < t; i++) {
for (int j = 0; j < t; j++) {
if (i == j) {
matAux[i][j] = 1;
} else {
matAux[i][j] = 0;
}
}
}
return matAux;
}
public static void fun_matrizInversa() {
fun_escalonarMatriz();
for (int i = 0; i < t; i++) {
for (int j = 0; j < t; j++) {
if (mi[i][j] != 0) {
if (mi[i][j] != 1) {
fun_multiplicar_fila(i, (pow(mi[i][j], -1)));
}
fun_cerosArriba(i, j);
fun_cerosAbajo(i, j);
break;
}
}
}
}
public static void fun_escalonarMatriz() {
int[] V = new int[t * t];
int j, ceros, bandera, aux;
for (int i = 0; i < t; i++) {
j = 0;
ceros = 0;
if (mi[i][j] == 0) {
do {
j = j + 1;
ceros = ceros + 1;
} while (mi[i][j] == 0);
}
V[i] = ceros;
}
do {
bandera = 0;
for (int i = 0; i < t - 1; i++) {
if (V[i] > V[i + 1]) {
aux = V[i];
V[i] = V[i + 1];
V[i + 1] = aux;
fun_permutarFilas(i, i + 1);
bandera = 1;
}
}
} while (bandera == 1);
}
public static void fun_permutarFilas(int f1, int f2) {
double aux;
for (int i = 0; i < t; i++) {
aux = mi[f1][i];
mi[f1][i] = mi[f2][i];
mi[f2][i] = aux;
aux = inversa[f1][i];
inversa[f1][i] = inversa[f2][i];
inversa[f2][i] = aux;
}
}
public static void fun_multiplicar_fila(int f, double factor) {
for (int i = 0; i < t; i++) {
mi[f][i] = mi[f][i] * factor;
inversa[f][i] = inversa[f][i] * factor;
}
}
public static void fun_cerosArriba(int f, int c) {
for (int i = 0; i < f; i++) {
fun_sumarFilaMultiplicada(i, f, (mi[i][c] * (-1)));
}
}
public static void fun_cerosAbajo(int f, int c) {
for (int i = c + 1; i < t; i++) {
fun_sumarFilaMultiplicada(i, f, (mi[i][c] * (-1)));
}
}
public static void fun_sumarFilaMultiplicada(int f1, int f2, double factor) {
for (int i = 0; i < t; i++) {
mi[f1][i] = mi[f1][i] + (mi[f2][i] * factor);
inversa[f1][i] = inversa[f1][i] + (inversa[f2][i] * factor);
}
}
public static int fun_comprobar() {
int bandera;
bandera = 0;
for (int i = 0; i < t; i++) {
for (int j = 0; j < t; j++) {
if (i == j) {
if (mi[i][j] != 1) {
bandera = 1;
}
} else {
if (mi[i][j] != 0) {
bandera = 1;
}
}
}
}
return bandera;
}
public static void sub_mostrar(String mensaje, double[][] mat) {
System.out.println("Los datos de la matriz " + mensaje + " son: ");
for (int i = 0; i < t; i++) {
for (int j = 0; j < t; j++) {
System.out.print(" " + mat[i][j]);
}
System.out.println("");
}
}
}
