public int addfraction(int a , int b, int c, int d)

public class myProg {
    public static void main (String[] args) {
        float a, b, c, d;
        a = console.nextInt();
        b = console.nextInt();
        c = console.nextInt();
        d = console.nextInt();
        
        Fraction frac = new Fraction(a,b,c,d);

     }
   }

public class Fraction{
    public Fraction(float a, float b, float c, float d){
        addFraction(a,b,c,d);
    }
}