How to remove the errors in the multi level inheritance in the following Java code? -

i learning multilevel inheritance in java , got stuck in following code.but it's showing 1 error.and there other way doing this.can inheritance while using methods?can help?thanks in advance. error:

shoppingmain.java:27: error: constructor b in class b cannot applied given types; { ^ required: string,int

found: no arguments

reason: actual , formal argument lists differ in length

1 error

    class a{     int price;     string product;     }      class b extends     {      int quantity;       int total;     b(string a,int b)     {      product=a;     price=b;     }     void productdetails()     {      system.out.println("the product name is"+product);      system.out.println("the price is"+price);     }     }      class c extends b     {     c(int c,int d)     {          //line 27     quantity=c;     total=d;     }     void productcost()     {     system.out.println("the quantity is"+quantity);     system.out.println("the total cost is"+total);     }     }      class shoppingmain     {     public static void main(string args[])     {      b obj1=new b("pen",5);     c obj2=new c(2,10);      obj1.productdetails();     obj2.productcost();     }     } 

as have declared constructor in father's class, , inheritance works creating each objects father child, neeed specify parameters create b object, using super keyword in c:

public class c extends b {     c(int c, int d)     {         super("prueba", 1);         quantity = c;         total = d;     }      void productcost()     {         system.out.println("the quantity is" + quantity);         system.out.println("the total cost is" + total);     } }