Hi, I'm having trouble understanding how modulus works. For an exercise I have to write a program where the user inputs how much change is needed in 2 dollar and 1 dollar coins as well as cents (50, 10, 5, 2, 1 cents). This is what I was thinking but doesn't work:
int x = input % 200;
int dollar2 = x / 200;
int dollar1 = input % 100;
int cent50 = x % 50;
int cent20 = input % 20;
int cent10 = x % 10;
int cent5 = input % 5;
int cent2 = x % 2;
int cent1 = input % 1;
Thanks
Define "it doesn't work".
Tell us the difference between your expectation and reality (for example).
It helps if you post an actual program we can run, not just a few random statements.
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
The first two statements are in the wrong order. You've already modified x before the division that assigns to dollar2. E.g., suppose x = 555. x % 200 yields 155, so now x is 155. Then you divide by 200, which yields 0 for dollar2, but it should have been 2. Clearly these need to be done in the opposite order.
After that, you start using the modulus statements to incorrectly assign values to dollar1, cent50, etc. Those need to be division statements and you need modulus statements after each of them to modify x each time.
