interface Compute{

public int compute(int n,int m);

}

class Add implements Compute{

@Override

public int compute(int num1, int num2) {

return num1+num2;

}

}

class Subtract implements Compute{

@Override

public int compute(int num1, int num2) {

return num1-num2;

}

}

class Multiply implements Compute{

@Override

public int compute(int num1, int num2) {

return num1*num2;

}

}

class Divide implements Compute{

@Override

public int compute(int num1, int num2) {

return num1/num2;

}}

class UseCompute{

public void useCom(Compute com, int one, int two){

System.out.println(com.compute(one,two));

}

}

public class Test{

public static void main(String args[]){

UseCompute u=new UseCompute();

Add a=new Add();

Divide d=new Divide();

Multiply m=new Multiply();

Subtract s=new Subtract();

System.out.print("35+7=");

u.useCom(a, 35, 7);

System.out.print("35/7=");

u.useCom(d, 35, 7);

System.out.print("35*7=");

u.useCom(m, 35, 7);

System.out.print("35-7=");

u.useCom(s, 35, 7);

}

}