Thread: car rental (project)

Please list the program design steps so we can see what you are working on and be able to write the statements for the step you are working on.

See the example in my post#24
A list of the steps the program would take to solve the problem written in English.

Here is another example for the steps in program development:
1) design the program
2) write the code
3)compile the code
4) if compiler errors go back to step 2
5) execute the code for testing
6) if errors found go back to step 1 and fix the logic

Ok, that's a start.
Where does the program read the first user input?

What should the program do after it shows the message: "pls try again"

What should the program do after step 3: type the num of days you want to rent
Does the program need to read the user's input?

Does "give" mean to display something to the user on the console?

the program should also have filereader

Not yet. The steps do NOT include any java classes or statements. They are all just statements of the logic.

You have skipped over completing the steps that were listed in post#29.

Please update that list with the added steps I recommended and any you think are needed.

For example you say: it should stop after you typed like 5
Is that after the message: "pls try again" is shown?
Are you saying the program should "stop" after showing that message?

step 3, the program needs to read the users input then ...

Each step should be simple
the then... part should be in the next steps. For these two steps:
multiply it by the value given by step 2 where
it will show ...

Step 3 has too many parts. It should be broken up:
3) program ask you "Enter the number of days" ,
4)after the user has typed in the number,
5)the program should switch the number of the car for the value (1 =400,2=500,3=600,4=700)
6)and multiply it by the number of days

the program should "stop"

Normally programs do not stop because of bad input. They should print a message and allow the user to try again.
That is done by putting the code for getting the input inside of a loop and not allowing execution to exit the loop until valid input is read from the user.
A program can exit/stop by calling the System exit method, but that is very unusual.

where do you add the file writer in the code

Which step in the list of steps for the program are you asking about?
I don't see anything in the list about writing files.
If there are supposed to be files written, could you complete the list with the steps that shows when file writing should be done?

which would be better for the coding filereader or writer

Which step in the list of steps are you talking about?
Pick one step and ask some specific questions about whether to use filereader or writer when coding that step.

The steps listed so far have not talked about disk files so I don't see where you would use either of those.

nvm it, lets ignore it for now since i want to ask my teacher about it more spesifically. so how is the coding/?

how is the coding/?

Does it compile without errors?
Does it execute and produce the desired results?
Have you tested it with different values to see what it does with good and bad input?

Please list the program design steps so we can see what you are working on and be able to write the statements for the step you are working on.

That appears to ask you to write the programs steps so I could help you with any you are having problems with.
If you have the list of steps and are having problems with one, post the step and ask your questions about that step.
The idea is you write the code for a step and ask questions about what you need help with to get the code to work.

If you need to finish writing the steps for the program, go ahead and finish writing the steps and post them.

the loop case using the if statement

Are you asking about validating a user's input?

Here is one way to use a loop to validate user input:
Begin loop
prompt for user's input
read user's input
test user's input
if input is valid exit loop
end loop - here execution goes back to the Begin loop

Look at using a while loop with a boolean variable to keep the loop going. When the input is valid, change the boolean variable's value to allow the loop to exit.

bring them back to step 1

Yes that is what a loop does.

Begin loop
step 1
if input <= 4, exit loop
// input > 4 so loop back to step 1
end loop

Another way to exit a loop is by using the break statement.

im still stuck with the loop

Please explain what happens when the code is compiled and executed.
What do you need help with?

Also please fix the indentation of the statements to show what is inside the while loop:

   while(condition) {
      statement 1
      statement 2
   }
   next statement

The code does not appear to follow the list of steps for the program.
The prompt for input should be inside the loop.
It does not read the user's input before testing it.
It exits the loop with invalid input

the condition in the while loop

Describe when you want the loop's execution to continue and when you want it to end?
Since the posted code uses a break statement, you could use the value: true as the condition
so that the loop continues until the break statement is executed.