class Tom{
void f(int x,double y){
x=x+1;
y=y+1;
System.out.printf("x y : %d,%3.2f\n",x,y);
}
}
public class Example4_7{
public static void main(String args[]){
int x=10;
double y=12.58;
Tom cat=new Tom();
cat.f(x,y);
System.out.printf("main x y: %d,%3.2f\n",x,y);
}
}