I'm trying to take two 2d array inputs, and then add them together, but it won't compile correctly. For some reason if i declare the 'addedMatrix' outside of the method the code compiles but the addedMatrix is blank
Heres what I have so far :
System.out.print("Enter Matrix 1 : ");
double[][] matrix1 = new double[3][3];
for (int r = 0; r < matrix1.length; r )
{
for (int c = 0; c < matrix1[0].length; c )
{
matrix1[r][c] = input.nextDouble();
}
}
System.out.print("Enter Matrix 2 : ");
double[][] matrix2 = new double[3][3];
for (int r = 0; r < matrix2.length; r )
{
for (int c = 0; c < matrix2[0].length; c )
{
matrix2[r][c] = input.nextDouble();
}
}
addMatrix(matrix1, matrix2);
System.out.println("The matrices added are : ");
for (int r = 0; r < addedMatrix.length; r )
{
for (int c = 0; c < addedMatrix[0].length; c )
{
System.out.print(addedMatrix[r][c] " ");
}
System.out.println();
}
public static double[][] addMatrix(double[][] arr1, double[][] arr2)
{
double[][] addedMatrix = new double[3][3];
for (int r = 0; r < addedMatrix.length; r )
{
for (int c = 0; c < addedMatrix[0].length; c )
{
addedMatrix[r][c] = arr1[r][c] arr2[r][c];
}
}
return addedMatrix;
}
CodePudding user response:
Your syntax is wrong completely firstly you need a main function and then you also need to accept the return type.
import java.util.Scanner;
public class Test {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.print("Enter Matrix 1 : ");
double[][] matrix1 = new double[3][3];
for(int r = 0; r < matrix1.length; r )
{
for(int c = 0; c < matrix1[0].length; c )
{
matrix1[r][c] = input.nextDouble();
}
}
System.out.print("Enter Matrix 2 : ");
double[][] matrix2 = new double[3][3];
for(int r = 0; r < matrix2.length; r )
{
for(int c = 0; c < matrix2[0].length; c )
{
matrix2[r][c] = input.nextDouble();
}
}
double[][] addedMatrix = addMatrix(matrix1, matrix2);
System.out.println("The matrices added are : ");
for(int r = 0; r < addedMatrix.length; r )
{
for(int c = 0; c < addedMatrix[0].length; c )
{
System.out.print(addedMatrix[r][c] " ");
}
System.out.println();
}
}
public static double[][] addMatrix(double[][] arr1, double[][] arr2)
{
double[][] addedMatrix = new double[3][3];
for(int r = 0; r < addedMatrix.length; r )
{
for(int c = 0; c < addedMatrix[0].length; c )
{
addedMatrix[r][c] = arr1[r][c] arr2[r][c];
}
}
return addedMatrix;
}
}