Java Program-Array Manipulation

ARRAY MANIPULATION

import java.util.*;
class matrix
{
int[][] m;
int r;
int c;
public matrix(int row,int column)
{
r=row;
c=column;
m=new int[row][column];
} //end of constructor with parameter
public void input()
{
System.out.println("Enter elements of matrix: ");
Scanner sc;
sc=new Scanner(System.in);
for(int i=0;i {
for(int j=0;j {
m[i][j]=sc.nextInt();
}
}
} //end of input
public void output()
{
for(int i=0;i {
for(int j=0;j {
System.out.print(m[i][j]+" ");
}
System.out.println(" ");
}
} //end of output
public matrix add(matrix a)
{
if(r==a.r)
{
if(c==a.c)
{
System.out.println("Addition is: ");
matrix temp;
temp=new matrix(r,c);
for(int i=0;i {
for(int j=0;j {
temp.m[i][j]=m[i][j]+a.m[i][j];
}
}
return temp;
}
else //column not equal
{
matrix temp;
temp=new matrix(0,0);
System.out.println("No. of rows & colunms must be same");
return temp;
}
} //end of inner if_else
else //row not equal
{
matrix temp;
temp=new matrix(0,0);
System.out.println("No. of rows & colunms must be same");
return temp;
} //end of outer if_else
} //end of add

public matrix subtract(matrix a)
{
if(r==a.r)
{
if(c==a.c)
{
System.out.println("Substraction is: ");
matrix temp;
temp=new matrix(r,c);
for(int i=0;i {
for(int j=0;j {
temp.m[i][j]=m[i][j]-a.m[i][j];
}
}
return temp;
}
else //column not equal
{
matrix temp;
temp=new matrix(0,0);
System.out.println("No. of rows & colunms must be same");
return temp;
}
} //end of inner if_else
else //row not equal
{
matrix temp;
temp=new matrix(0,0);
System.out.println("No. of rows & colunms must be same");
return temp;
} //end of outer if_else
} //end of subtract

public matrix multiply(matrix a)
{
if(c==a.r)
{
System.out.println("Multiplication is: ");
matrix temp;
temp=new matrix(r,a.c);
for(int i=0;i {
for(int j=0;j {
temp.m[i][j]=0;
for(int k=0;k {
temp.m[i][j]+=m[i][k]*a.m[k][j];
}
}
}
return temp;
}
else //row not equal
{
matrix temp;
temp=new matrix(0,0);
System.out.println("No. of colunms of first matrix must be equal to rows of second matrix");
return temp;
} //end of if_else
} //end of multiply

} //end of class matrix

public class matrixoperations
{
public static void main(String[] args)
{
Scanner sc;
sc=new Scanner(System.in);
int row,column;
System.out.print("Enter row size: ");
row=sc.nextInt();
System.out.print("Enter column size: ");
column=sc.nextInt();
matrix a;
a=new matrix(row,column);
a.input();
System.out.println("Matrix a is:");
a.output();
int r,c;
System.out.print("Enter row size: ");
r=sc.nextInt();
System.out.print("Enter column size: ");
c=sc.nextInt();
matrix b;
b=new matrix(r,c);
b.input();
System.out.println("Matrix b is:");
b.output();
int choice;
do
{
System.out.print("1:Addition 2:Substraction 3:Multiplication 0:Exit Enter your choice: ");
choice=sc.nextInt();
switch(choice)
{
case 1:
matrix d;
d=new matrix(r,c);
d=a.add(b);
d.output();
break;
case 2:
matrix e;
e=new matrix(r,c);
e=a.subtract(b);
e.output();
break;
case 3:
matrix f;
f=new matrix(r,a.c);
f=a.multiply(b);
f.output();
break;
case 0:
break;
default:
System.out.println("Invalid choice");
} //end of switch
}while(choice!=0); //end of do_while
} //end of main
} //end of class matrixoperations

Java Program-Array Manipulation

Post Comment: