//Multiplication of two matrixs in java
import java.io.*;
class arraymul
{
public static void main(String[] arg)
{
int m,n,p,q;
BufferedReader in=new BufferedReader(new InputStreamReader(System.in));
int a[ ][ ]=new int[30][30];
int b[ ][ ]=new int[30][30];
int c[ ][ ]=new int[30][30];
try
{
System.out.print("Enter the number of rows in first matrix: ");
m=Integer.parseInt(in.readLine());
System.out.print("Enter the number of column in first matrix: ");
n=Integer.parseInt(in.readLine());
System.out.print("Enter the number of rows in second matrix: ");
p=Integer.parseInt(in.readLine());
System.out.print("Enter the number of column in second matrix: ");
q=Integer.parseInt(in.readLine());
if(n==p)
{
System.out.print("Enter the value of elements of first array: ");
for(int i=0;i< m;i++)
{
for(int j=0;j<n;j++)
{
a[i][j]=Integer.parseInt(in.readLine());
}
}
System.out.print("Enter the value of elements of second array: ");
for(int i=0;i<p;i++)
{
for(int j=0;j<q;j++)
{
b[i][j]=Integer.parseInt(in.readLine());
}
}
for(int i=0;i< m;i++)
{
for(int j=0;j<q;j++)
{
c[i][j]=0;
for(int k=0;k<n;k++)
{
c[i][j]+=a[i][k]*b[k][j];
}
}
}
System.out.println("First matrix:");
for(int i=0;i< m;i++)
{
for(int j=0;j<n;j++)
{
System.out.print(a[i][j]+" ");
}
System.out.println();
}
System.out.println("Second matrix:");
for(int i=0;i<p;i++)
{
for(int j=0;j<q;j++)
{
System.out.print(b[i][j]+" ");
}
System.out.println();
}
System.out.println("Multiplication of two matrixs:");
for(int i=0;i< m;i++)
{
for(int j=0;j<q;j++)
{
System.out.print(c[i][j]+" ");
}
System.out.println();
}
}
else
{
System.out.print("Multiplication is not possible ");
}
}
catch(Exception e){ }
}
}
