Lo gauy can anyone know about the class and objects in java.this is my class and objects.but it doesn't work

Question

class sum{
int c,a,b;
void summ(int a,int b){
c=a+b;
}
void show(){
System.out.println(c);}
}
class simple{
public static void main (String a[]){
sum s=new sum();
sum sa=new sum();
s.a=23;
s.b=34;

s.summ(a,b);
s.show();
}
}

Answer 1

In statement, s.summ(a, b) ; a, b are undefined. Use
s.summ(s.a, s.b) ;