﻿ C# Sharp Exercises: Multiplication of two Matrices - w3resource

# C# Sharp Exercises: Multiplication of two Matrices

## C# Sharp Array: Exercise-21 with Solution

Write a program in C# Sharp for multiplication of two square Matrices.

Sample Solution:-

C# Sharp Code:

``````using System;
public class Exercise21
{
public static void Main()
{
int i,j,k,r1,c1,r2,c2,sum=0;

int[,] arr1 = new int[50,50];
int[,] brr1 = new int[50,50];
int[,] crr1 = new int[50,50];

Console.Write("\n\nMultiplication of two Matrices\n");
Console.Write("----------------------------------\n");

Console.Write("\nInput the number of rows and columns of the first matrix :\n");
Console.Write("Rows : ");
Console.Write("Columns : ");

Console.Write("\nInput the number of rows of the second matrix :\n");
Console.Write("Rows : ");
Console.Write("Columns : ");

if(c1!=r2){
Console.Write("Mutiplication of Matrix is not possible.");
Console.Write("\nColumn of first matrix and row of second matrix must be same.");
}
else
{
Console.Write("Input elements in the first matrix :\n");
for(i=0;i<r1;i++)
{
for(j=0;j<c1;j++)
{
Console.Write("element - [{0}],[{1}] : ",i,j);
}
}
Console.Write("Input elements in the second matrix :\n");
for(i=0;i<r2;i++)
{
for(j=0;j<c2;j++)
{
Console.Write("element - [{0}],[{1}] : ",i,j);
}
}
Console.Write("\nThe First matrix is :\n");
for(i=0;i<r1;i++)
{
Console.Write("\n");
for(j=0;j<c1;j++)
Console.Write("{0}\t",arr1[i,j]);
}

Console.Write("\nThe Second matrix is :\n");
for(i=0;i<r2;i++)
{
Console.Write("\n");
for(j=0;j<c2;j++)
Console.Write("{0}\t",brr1[i,j]);
}
//multiplication of matrix
for(i=0;i<r1;i++)
for(j=0;j<c2;j++)
crr1[i,j]=0;
for(i=0;i<r1;i++)    //row of first matrix
{
for(j=0;j<c2;j++)    //column of second matrix
{
sum=0;
for(k=0;k<c1;k++)
sum=sum+arr1[i,k]*brr1[k,j];
crr1[i,j]=sum;
}
}
Console.Write("\nThe multiplication of two matrix is : \n");
for(i=0;i<r1;i++)
{
Console.Write("\n");
for(j=0;j<c2;j++)
{
Console.Write("{0}\t",crr1[i,j]);
}
}
}
Console.Write("\n\n");
}
}
```
```

Sample Output:

```Multiplication of two Matrices
----------------------------------
Input the number of rows and columns of the first matrix :
Rows : 2
Columns : 2
Input the number of rows of the second matrix :
Rows : 2
Columns : 2
Input elements in the first matrix :
element - [0],[0] : 1
element - [0],[1] : 2
element - [1],[0] : 3
element - [1],[1] : 4
Input elements in the second matrix :
element - [0],[0] : 5
element - [0],[1] : 6
element - [1],[0] : 7
element - [1],[1] : 8
The First matrix is :
1       2
3       4
The Second matrix is :
5       6
7       8
The multiplication of two matrix is :
19      22
43      50
```

Flowchart:

C# Sharp Code Editor: