Write a program to declare a matrix A[][]of order ( M*N) where ‘M’ is the number of rows and ‘N’ is the number of columns such that the value of “M’ must be greater than 0 and less than 10 and the value of ‘N’ must be greater than 2 and less than 6. Allow the user to input digits (0-7) only at each location, such that each row represents an octal number.

Example: 

231(decimal equivalent of 1st row=153 i.e. 2*8² +3*8¹ +1*8⁰)    
405(decimal equivalent of 1st row=261 i.e. 4*8¹ +0*8¹ +5*8⁰) 
156(decimal equivalent of 1st row=110 i.e. 1*8² +5*8¹ +6*8⁰)

Perform the following tasks on the matrix:

• Display the original matrix.
• Calculate the decimal equivalent for each row and display as per the format given below.

Example 1:
Input:
M=1        
N=3            
ENTER ELEMENTS FOR ROW 1: 1   4  4
Output:
FILLED MATRIX   DECIMAL EQUIVALENT 
1  4  4                100



Example 2:
Input:
 M=3           
 N=4            
ENTER ELEMENTS FOR ROW 1: 1 1 3 7           
ENTER ELEMENTS FOR ROW 2: 2 1 0 6            
ENTER ELEMENTS FOR ROW 3: 0 2 4 5
Output:            
FILLED MATRIX   DECIMAL EQUIVALENT                          
1 1 3 7         607                             
2 1 0 6         1094                             
0 2 4 5         165



Example 3:
Input:
ENTER ROW SIZE  M=3           
ENTER COLUMN SIZE N=9
Output:OUT OF RANGE

import java.util.*;
class mat
{
    public static void main(String args[])
    {
        Scanner sc=new Scanner(System.in);
        System.out.println("Enter no.of rows M ");
        int m=sc.nextInt();
        System.out.println("Enter no.of rows N ");
        int n= sc.nextInt();
        int flag=0,pow=0;  
        int mat[][]=new int[m][n];
        if((m>0 && m< 10 )&&(n>2 && n<6))          //M >0 AND <10  && N>2 AND <6
        {  
            for(int i=0;i<m;i++)
            {System.out.print("Enter elements for row "+(i+1)+":");
                for(int j=0;j<n;j++)
                {
                     mat[i][j]=sc.nextInt();
                     if(mat[i][j] < 0 ||   mat[i][j]>7)     //ALLOW THE USER TO INPUT ONLY FROM 0 TO 7 (OCTAL)
                    {
                        flag=1;
                        System.out.println("INPUT DIGITS (0 -7) ONLY AT EACH LOCATION");
                        System.exit(1);
                        
                    }
                 
                }
                
            }   
        }
        if(flag==0)
        {
            System.out.println("FILLED MATRIX \t DECIMAL EQUIVALENT");
                      for(int i=0;i<m;i++)
                      {
                         int r=0,sum=0;
                          for(int j=n-1;j>=0;j--)  
                          {   
                                  pow=((int)Math.pow(8,r++)); 
                                  sum=sum+(mat[i][j]*pow);
                    
                           }
                           
                           for(int k=0;k<n;k++)
                           {
                               System.out.print(mat[i][k]+ " " );
                           }
                            System.out.print("\t\t \t" +sum);
                            System.out.println();
                      }
         }       
           
                
else
        System.out.println("Enter valid range"); 
 }
}



        
        

OUTPUT:

Enter no.of rows M
3
Enter no.of rows N
3
Enter elements for row 1:2 3 1
Enter elements for row 2:4 0 5
Enter elements for row 3:1 5 6

FILLED MATRIX DECIMAL EQUIVALENT
2 3 1 153
4 0 5 261
1 5 6 110