0

I had an assignment to create a calculator in two ways,

1) Method returning values.

2) Method without returning values.

I've done this with methods returning values but how could i add, subtract, divide , multiply without returning a value from methods ?

```
import java.io.*;
class first{
int a=5,b=2,c;
public int add(){
c=a+b;
return c;
}
public int subtract(){
c=a-b;
return c;
}
public int divide(){
c=a/b;
return c;
}
public int multiply(){
c=a*b;
return c;
}
public void printf(){
System.out.print("Answer is " + c);
}
}
class main1{
public static void main (String args[])throws IOException{
String s1;
InputStreamReader ab=new InputStreamReader(System.in);
BufferedReader cd =new BufferedReader (ab);
System.out.print ("Input +, -, / or * : ");
s1=cd.readLine();
first object1= new first();
if (s1.equals("+"))
object1.add();
else if (s1.equals("-"))
object1.subtract();
else if (s1.equals("/"))
object1.divide();
else if (s1.equals("*"))
object1.multiply();
object1.printf();
}
}
```