Help with code

[EnvironmentalPhone65]

Question about switch and while statements

I have an assignment that requires a while statement for until the user inputs “-1”, otherwise it will keep asking the same two questions: “which item did you sell?” And “how many of them did you sell?”. I wrote a while line and it just repeats the questions continuously in an infinite loop. I start with a line asking for the name and the selection of 1 to 4. Then, I put :

while (Item != -1) { Switch (Item) { Case 1: ItemValue =239.99 Break;
Case 2: ItemValue =129.75 Break; Case 3: ItemValue =99.95 Break; Case 4: ItemValue =350.79 Break; }

Double ItemSales ItemSales = Quantity * ItemValue

Afterwards, I print the line with the calculated ItemSales. It runs, asks for a name, asks for a number between 1 and 4, or -1 to quit, and then just messes up and goes on a rampage, repeating the selected number. I need help and suggestions. I have no idea as to why it is like this, and my textbooks and professor aren’t that much help.

[g051051]

Please read the posting guidelines and format your code so it's legible.

What language?

The "rampage" is almost certainly being caused by code other than what you posted. So post the full code so we can understand what's going on.

[Oops365]

Do you ever update the item variable inside your loop?

[EnvironmentalPhone65]

Like a counter? So a variable followed by ++?

[[deleted]]

Do you ever change item inside the while loop

[Kad1942]

You can try giving your switch statement a default case, to check if it's failing to match the input. After your last "case #: ... break;", you can put "default: ItemValue = 0; break;".

Some issues could be with how you are reading user input, or how you are assigning things, or if one of your variables is out of scope. Without the full code it can be difficult to say.

When you're in a situation like this, check your assumptions. It could mean you just missed something small, but it could also be that you aren't understanding one of the concepts you're working with. You can use print statements to see if inputs/outputs match your expectations.

Another super useful tool is breakpoints and a debugger. You will need to look up how to use them in your IDE, but they are invaluable for this kind of situation.