Write a program of addition of complex number

import java.io.*;

class complex25

{

int real;

int img;

public void input()

throws IOException

{

BufferedReader br=new BufferedReader(new InputStreamReader(System.in));

System.out.println("enter the real and imaginary part");

real=Integer.parseInt(br.readLine());

img=Integer.parseInt(br.readLine());

}

public void output()

{

System.out.println(real+"+"+img+"i");

}

public complex25 sum(complex25 c1,complex25 c2)

{

complex25 c3=new complex25();

c3.real=c1.real+c2.real;

c3.img=c1.img+c2.img;

return c3;

}

}

class complex25main

{

public static void main(String[] arg)

throws IOException

{

complex25 c1=new complex25();

complex25 c2=new complex25();

complex25 c3=new complex25();

c1.input();

c2.input();

System.out.println("first complex no is=");

c1.output();

System.out.println("second complex no is=");

c2.output();

c3=c3.sum(c1,c2);

System.out.println("result is=");

c3.output();

}}