matric multiplication
using System;
class MainClass {
public static void Main (string[] args) {
var marixOne = new Matrix(2,3,new int[6]{3,2,1,2,0,-1});
var marixTwo = new Matrix(3,2,new int[6]{3,1,-2,0,1,2});
var idea = marixOne * marixTwo;
marixOne.Print();
marixTwo.Print();
idea.Print();
}
}
// Using one dimensional array .
public class Matrix{
public int row;
public int column;
public int[] arrayContainer;
public Matrix(int numberOfrow , int numberOfcol, int[] containerArray){
row = numberOfrow;
column = numberOfcol;
arrayContainer = new int [row * column];
for(int i = 0; i < row*column ;i++){arrayContainer[i]= containerArray[i];}
}
public static Matrix operator *(Matrix a , Matrix b){
var ispossible = a.column == b.row;
if(!ispossible) return null;
var numberofItemsInArray = a.row * b.column ;
var resultArray = new int[numberofItemsInArray];
var count = 0;
var resultitem = 0;
for(int currentRow =0 ; currentRow < a.row ; currentRow++)
{
for(int currentColoumn = 0 ; currentColoumn < b.column ; currentColoumn++ )
{
for(int index = 0 ; index < b.row;index++){
var row_item = a.arrayContainer[index + a.column * currentRow];
var coloumn_item = b.arrayContainer[currentColoumn + b.column * index ];
resultitem += row_item * coloumn_item ;
/*
Console.WriteLine($"row_item = {row_item},coloumn_item = {coloumn_item},multiplication = {row_item * coloumn_item } resultitem = {resultitem }");
*/
}
/*Console.WriteLine("--\n--"); */
resultArray[count] = resultitem ;
resultitem = 0;
count++;
}
}
return new Matrix(a.row,b.column,resultArray);
}
public void Print(){
Console.WriteLine("\n");
for(int currentRow = 0 ; currentRow<row ; currentRow++ ){
var item = "";
for(int currentcoloumn = 0 ; currentcoloumn<column ; currentcoloumn++)
{
item +=" "+arrayContainer[currentcoloumn+column*currentRow];
}
Console.WriteLine(item);
item = string.Empty;
}
Console.WriteLine("\n\n");
}
}