Does anyone solve the error?

Question

https://code.sololearn.com/cr8TvLGq4jyO/?ref=app

Answer 1

I tried removing show function and added print statement in calcFee function, called calcFee instead of show, it seems to work
https://code.sololearn.com/cL9dW42bgj5z/?ref=app

Answer 2

Variable declared within a method will have local scope to method. And does not exist outside of that method. So declare those outside method, class level scope if you access it outside too.
=> about tutionFee, amount variables..
Yes. Another,
Error: calcStipend() vs clacStipend()

Answer 3

Hi, the error thrown is a syntax error. The spelling of the method you have defined and used are different. You have defined clacStipend method but have invoked calcStipend. Please fix the typo and try executing.

Answer 4

Hi! have you written this code yourself or copied it?

Answer 5

Jayakrishna🇮🇳 is it okay now? But Still getting 0.0 in output

interface BasicExp{
double hostelFee=5000.00, examFee=1200;
void calcFee();

}
class Stipend{

double totalStipend;
double tutionFee=75000;
int cgpa;
void clacStipend(int cgpa){
if(cgpa<7){
totalStipend=tutionFee*0.25;
System.out.println("Exc1");

}
else{
totalStipend =tutionFee*0.40;
}
}
}

class TotalFee extends Stipend implements BasicExp{
double amount;
public void calcFee(){
amount =(hostelFee+examFee+tutionFee)-totalStipend;
}
void show(){
System.out.println(amount);

}
}
class Output{
public static void main(String args[]){
TotalFee tf=new TotalFee();
tf.clacStipend(7);
tf.show();
}
}

Answer 6

Avi Jit In your code,
tf.calcFee() ; // call this before
tf.show() ;

// no need int cpga; outside method.

Answer 7

Updated the code, i didnt realize that the amount is defined both as local variable and class variable. So when local variable amount was updated in calcFee function it didnt reflect, corrected it.
https://code.sololearn.com/cL9dW42bgj5z/?ref=app

Answer 8

Thank you guys!
it was a great quest of bug hunting 😁
https://code.sololearn.com/cr8TvLGq4jyO/?ref=app

Answer 9

Prathyusha Muppidi
I have corrected the typos but but getting 0.0 in output. Somehow I think "cgpa" value is not passing. Here is the code:

interface BasicExp{
double hostelFee=5000.00, examFee=1200;
void calcFee();

}
class Stipend{

double totalStipend;
double tutionFee=75000;
int cgpa;
void clacStipend(int cgpa){
if(cgpa<7){
totalStipend=tutionFee*0.25;
System.out.println("Exc1");

}
else{
totalStipend =tutionFee*0.40;
}
}
}

class TotalFee extends Stipend implements BasicExp{
double amount;
public void calcFee(){
amount =(hostelFee+examFee+tutionFee)-totalStipend;
}
void show(){
System.out.println(amount);

}
}
class Output{
public static void main(String args[]){
TotalFee tf=new TotalFee();
tf.clacStipend(7);
tf.show();
}
}

Answer 10

Prathyusha Muppidi Amazing it works! But if try my method, how to get access the value of "amount" under the method "show()" ?

Answer 11

Prathyusha Muppidi just now, I got the bug actually in my code, I am never using the method "calcFee" to compute the "amount" that is how it's showing the default double value 0.0.

See here this working now:

interface BasicExp{
double hostelFee=5000.00, examFee=1200;
void calcFee();

}
class Stipend{

double totalStipend;
double tutionFee=75000;
int cgpa;
void clacStipend(int cgpa){
if(cgpa<7){
totalStipend=tutionFee*0.25;
System.out.println("Exc1");

}
else{
totalStipend =tutionFee*0.40;
}
}
}

class TotalFee extends Stipend implements BasicExp{

double amount;
public void calcFee(){
amount =(hostelFee+examFee+tutionFee)-totalStipend;

}
void show(){
System.out.println(amount);

}
}
class Output2{
public static void main(String args[]){
TotalFee tf=new TotalFee();
tf.clacStipend(7);
tf.calcFee();
tf.show();
}
}