Hi,please someone can give me link to learn about matrix (two dimensional array) in C# with exercises and solution. Thanks in advance.
Answered by:- jaiprakash
You should be familiar with one dimensional arrays. The data in arrays may be any type. While a one dimensional array works for a sequence of data, we need something more for a two dimensional table, where data values vary over both row and column.
If we have a table of integers, for instance with three rows and four columns:
2 4 7 55
3 1 8 10
6 0 49 12We could declare an array variable of the right size as
int[,] table = new int[3, 4];Multiple indices are separated by commas inside the square brackets. In declaring an array type, no indices are included so the [,] indicates a two dimensional array. Where the new object is being created, the values inside the square brackets give each dimension.
In general the notation for a two dimensional array declaration is:
type [, ] variableName
and to create a new array with default values:
new type [ intExpression1, intExpression2 ]
where the expressions evaluate to integers for the dimension
using System;
class Program
{
static void Main()
{
// ... Create 2D array of strings.
string[,] array = new string[,]
{
{"cat", "dog"},
{"bird", "fish"},
};
// ... Print out values.
Console.WriteLine(array[0, 0]);
Console.WriteLine(array[0, 1]);
Console.WriteLine(array[1, 0]);
Console.WriteLine(array[1, 1]);
}
}Output:
cat
dog
bird
fishusing System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ConsoleApplication8
{
class Program
{
public static void Main(string[] args)
{
int m, n,i,j;
Console.Write("Enter Number Of Rows And Columns Of Matrices A and B : ");
m = Convert.ToInt16(Console.ReadLine());
n = Convert.ToInt16(Console.ReadLine());
int[,] A = new int[10, 10];
Console.Write("\nEnter The First Matrix : ");
for (i = 0; i < m; i++)
{
for (j = 0; j < n; j++)
{
A[i, j] = Convert.ToInt16(Console.ReadLine());
}
}
int[,] B = new int[10, 10];
Console.Write("\nEnter The Second Matrix:");
for (i = 0; i < m; i++)
{
for (j = 0; j < n; j++)
{
B[i, j] = Convert.ToInt16(Console.ReadLine());
}
}
Console.Clear();
Console.WriteLine("\nMatrix A : ");
for (i = 0; i < m; i++)
{
for (j = 0; j < n; j++)
{
Console.Write(A[i, j] + "\t");
}
Console.WriteLine();
}
Console.WriteLine("\nMatrix B: ");
for (i = 0; i < m; i++)
{
for (j = 0; j < n; j++)
{
Console.Write(B[i, j] + "\t");
}
Console.WriteLine();
}
int[,] C = new int[10, 10];
for (i = 0; i < m; i++)
{
for (j = 0; j < n; j++)
{
C[i, j] = A[i, j] + B[i, j];
}
}
Console.Write("\nSum Matrix :");
for (i = 0; i < m; i++)
{
for (j = 0; j < n; j++)
{
Console.Write(C[i, j] + "\t");
}
Console.WriteLine();
}
Console.Read();
}
}
}Output:
Enter Number Of Rows And Columns Of Matrices A and B : 3 3
Enter the First Matrix :
1 2 3
2 3 4
3 4 5
Enter the Second Matrix :
1 2 3
2 1 4
1 1 5
Matrix A :
1 2 3
2 3 4
3 4 5
Matrix B :
1 2 3
2 1 4
1 1 5
Sum Matrix :
2 4 6
4 4 8
4 5 10using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace matrix_multiplication {
class Program {
static void Main(string[] args) {
int i, j, m, n;
Console.WriteLine("Enter the Number of Rows and Columns : ");
m = Convert.ToInt32(Console.ReadLine());
n = Convert.ToInt32(Console.ReadLine());
int[, ] a = new int[m, n];
Console.WriteLine("Enter the First Matrix");
for (i = 0; i < m; i++) {
for (j = 0; j < n; j++) {
a[i, j] = int.Parse(Console.ReadLine());
}
}
Console.WriteLine("First matrix is:");
for (i = 0; i < m; i++) {
for (j = 0; j < n; j++) {
Console.Write(a[i, j] + "\t");
}
Console.WriteLine();
}
int[, ] b = new int[m, n];
Console.WriteLine("Enter the Second Matrix");
for (i = 0; i < m; i++) {
for (j = 0; j < n; j++) {
b[i, j] = int.Parse(Console.ReadLine());
}
}
Console.WriteLine("Second Matrix is :");
for (i = 0; i < 2; i++) {
for (j = 0; j < 2; j++) {
Console.Write(b[i, j] + "\t");
}
Console.WriteLine();
}
Console.WriteLine("Matrix Multiplication is :");
int[, ] c = new int[m, n];
for (i = 0; i < m; i++) {
for (j = 0; j < n; j++) {
c[i, j] = 0;
for (int k = 0; k < 2; k++) {
c[i, j] += a[i, k] * b[k, j];
}
}
}
for (i = 0; i < m; i++) {
for (j = 0; j < n; j++) {
Console.Write(c[i, j] + "\t");
}
Console.WriteLine();
}
Console.ReadKey();
}
}
}Output:
Enter the First Matrix
8
7
6
10
First Matrix is :
8 7
6 10
Enter the Second Matrix
4
3
2
1
Second Matrix is :
4 3
2 1
Matrix multiplication is :
46 31
44 28using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Program {
class Program {
public static void Main(string[] args) {
int m, n, i, j;
Console.Write("Enter the Order of the Matrix : ");
m = Convert.ToInt16(Console.ReadLine());
n = Convert.ToInt16(Console.ReadLine());
int[, ] A = new int[10, 10];
Console.Write("\nEnter The Matrix Elements : ");
for (i = 0; i < m; i++) {
for (j = 0; j < n; j++) {
A[i, j] = Convert.ToInt16(Console.ReadLine());
}
}
Console.Clear();
Console.WriteLine("\nMatrix A : ");
for (i = 0; i < m; i++) {
for (j = 0; j < n; j++) {
Console.Write(A[i, j] + "\t");
}
Console.WriteLine();
}
Console.WriteLine("Transpose Matrix : ");
for (i = 0; i < m; i++) {
for (j = 0; j < n; j++) {
Console.Write(A[j, i] + "\t");
}
Console.WriteLine();
}
Console.Read();
}
}
}Output:
Enter the Order of the Matrix : 2 2
Enter the Matrix Elements :
1 2
3 4
Matrix A :
1 2
3 4
Transpose Matrix :
1 3
2 4Reference links, which may be helpful for you
http://anh.cs.luc.edu/170/notes/CSharpHtml/twodim.html
https://www.dotnetperls.com/2d
https://www.sanfoundry.com/csharp-programming-examples-on-matrix/
Hope it clear your knowledge of C# two-dimensional array and matrix.
Answered by:- LuneAgile
Thank you so much Jai Prakash .
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