Input Validation muliples of 100?

[Sabensohn70]

I am suppose to write a code to validate that the users input is between 0-4000 and are multiples of 100. How do i write a code to ensure that the cin is multiples of 100? So far i have

cin >> store1;
if ( store1 < 0 || store1 > 4000 )
{
     cout << " Invalid entry ";

I just dont know how to make it so the program knows whether the cin is multiples of 100 or not.

[Lindley]

Use the modulus operator (&#37.

Alternatively, you could divide by 100 and then multiply by 100, and check if the result is the same as the original.

[Sabensohn70]

how would the modulus operator work? isn't the function for the operator to show the remainder of a division problem

[Lindley]

And if the value is a multiple of 100, then the remainder when dividing by 100 will be....

You should also consider whether or not you're required to check that the user's input really was an integer. If they enter "apple", can your code handle that?

[Sabensohn70]

well i'ts just a simple program assignment and my teacher has already given us a set of inputs. Could you give me an example of using the modulus operator for the multiple of 100?

[GCDEF]

well i'ts just a simple program assignment and my teacher has already given us a set of inputs. Could you give me an example of using the modulus operator for the multiple of 100?

Google is your friend

[Sabensohn70]

what i mean is how do i combine it to my code?

while ( store1 &#37; 100 != 0 && store1 < 0 || store1 > 4000 )

i tried that
that does not work.

[Lindley]

Operator precedence issue, I suspect. Normally && has higher precedence than ||, but I think you intend the opposite to be true here. Throw on some parentheses to fix it.

[monarch_dodra]

This should enlighten you:

http://www.parashift.com/c++-faq-lit....html#faq-15.3

Read it, learn it. It might be a little advanced, but you don't need to understand every underlying mechanism, just how to use it.

Also, if this is for school, I recommend you replace "std::numeric_limits<std::streamsize>::max()" with "100", or your teacher might tell you you "cheated" (whatever that means).