Programming For Future

class ComplexNumber { int r=0; int i=0; String c; ComplexNumber(int r,int i){ this.r=r; this.i=i; if(i>=0) c=""+r+"+"+i+"i"; else c=""+r+i+"i"; } public String toString(){ return c; } public ComplexNumber add(ComplexNumber c){ int r=this.r+c.r; int i=this.i+c.i; return new ComplexNumber(r,i); } } class Complex{ public static void main(String ar[]) { ComplexNumber c1=new ComplexNumber(2,3); ComplexNumber c2=new ComplexNumber(1,-2); ComplexNumber c3=c1.add(c2); System.out.println(c1); System.out.println(c2); System.out.println(c3); } }