'matrix' containing an integer matrix as a member and method

Question

I need below question answer please help me.

Desgin a c# class called 'matrix' containing an integer matrix as a member and methods to
1) read the elements of the matrix from the keyboard.
2) to find the product of two matrices
3) to print the elements in the matrix from write a main() method to read the matrices and find their product print all the three matrices.

Vulpes · Answer

Try this: using System; class Matrix { private int[] _matrix; public int Rows { get { return _matrix.GetLength(0); } } public int Cols { get { return _matrix.GetLength(1); } } public int this[int row int col] { get { return _matrix[row col]; } set { _matrix[row col] = value; } } public Matrix(int rows int cols) { _matrix = new int[rows cols]; } public void Fill() { Console.WriteLine(Enter elements of each row separated by spaces
); for(int i = 0; i { Console.Write( Row {0} :  i + 1); string input = Console.ReadLine(); string[] elements = input.Split(new char[]{' '} StringSplitOptions.RemoveEmptyEntries); if (elements.Length != this.Cols) { Console.WriteLine(There must be exactly {0} columns try again this.Cols); --i; } else { for(int j = 0; j { int.TryParse(elements[j] out _matrix[ij]); } } } } public void Print() { for(int i = 0; i { for(int j = 0; j { Console.Write({03}  _matrix[ij]); } Console.WriteLine(); } } public static Matrix Multiply(Matrix m1 Matrix m2) { if(m1.Cols != m2.Rows) throw new ArgumentException(Matrices cannot be multiplied); Matrix m3 = new Matrix(m1.Rows m2.Cols); // all zero by default for (int i = 0; i { for (int j = 0; j { for (int k = 0; k { m3[i j] += m1[i k] * m2[k j]; } } } return m3; } } class Program { static void Main() { int rows1; do { Console.Write(Enter number of rows for matrix 1 : ); int.TryParse(Console.ReadLine() out rows1); } while(rows1 int cols1; do { Console.Write(Enter number of cols for matrix 1 : ); int.TryParse(Console.ReadLine() out cols1); } while(cols1 var m1 = new Matrix(rows1 cols1); m1.Fill(); Console.WriteLine(); int rows2; do { Console.Write(Enter number of rows for matrix 2 : ); int.TryParse(Console.ReadLine() out rows2); } while(rows2 int cols2; do { Console.Write(Enter number of cols for matrix 2 : ); int.TryParse(Console.ReadLine() out cols2); } while(cols2 var m2 = new Matrix(rows2 cols2); m2.Fill(); Matrix m3 = Matrix.Multiply(m1 m2); Console.WriteLine(
Printing matrix 1 ...
); m1.Print(); Console.WriteLine(
Printing matrix 2 ...
); m2.Print(); Console.WriteLine(
Printing matrix 3 ...
); m3.Print(); Console.ReadKey(true); } } Sample input and output: Enter number of rows for matrix 1 : 2 Enter number of cols for matrix 1 : 4 Enter elements of each row separated by spaces Row 1 : 1 3 5 7 Row 2 : 2 4 6 8 Enter number of rows for matrix 2 : 4 Enter number of cols for matrix 2 : 3 Enter elements of each row separated by spaces Row 1 : 1 8 9 Row 2 : 2 7 10 Row 3 : 3 6 11 Row 4 : 4 5 12 Printing matrix 1 ... 1 3 5 7 2 4 6 8 Printing matrix 2 ... 1 8 9 2 7 10 3 6 11 4 5 12 Printing matrix 3 ... 50 94 178 60 120 220