D) Write a Java
program to multiply two given matrices.
Program:
import java.io.*;
class MatrixMul
{
public static void main(String args[])
throws IOException
{
int r1,c1,r2,c2,i,j,k;
BufferedReader br=new
BufferedReader(new InputStreamReader(System.in));
System.out.print("Enter
No. Of Rows & Columns for Matrix 1:");
r1=Integer.parseInt(br.readLine());
c1=Integer.parseInt(br.readLine());
System.out.print("Enter
No. Of Rows & Columns for Matrix 2:");
r2=Integer.parseInt(br.readLine());
c2=Integer.parseInt(br.readLine());
if(r2==c1)
{
int a[][]=new
int[r1][c1];
int b[][]=new
int[r2][c2];
int c[][]=new int[r1][c2];
System.out.println("Enter Values for Matrix 1:");
for(i=0;i<r1;i++)
{
for(j=0;j<c1;j++)
a[i][j]=Integer.parseInt(br.readLine());
}
System.out.println("Enter Values for Matrix 2:");
for(i=0;i<r2;i++)
{
for(j=0;j<c2;j++)
b[i][j]=Integer.parseInt(br.readLine());
}
System.out.println("MATRIX MULTIPLICATION RESULT:");
for(i=0;i<r1;i++)
{
for(j=0;j<c2;j++)
{
c[i][j]=0;
for(k=0;k<r2;k++)
c[i][j]=(a[i][k]*b[k][j])+c[i][j];
}
}
for(i=0;i<r1;i++)
{
for(j=0;j<c2;j++)
System.out.print(" "+c[i][j]);
System.out.println();
}
}
else System.out.print("Invalid ORDER Of
Matrices");
}
}
Output:
Enter No. Of
Rows & Columns for Matrix 1:2
3
Enter No. Of
Rows & Columns for Matrix 2:3
2
Enter Values
for Matrix 1:
1
2
3
4
5
6
Enter Values
for Matrix 2:
1
2
3
4
5
6
MATRIX
MULTIPLICATION RESULT:
22 28
49 64
