C# Help. I always have dumb face on.

Best way to learn is to just code. Write something simple, tweak it a lot until you understand how and why it works, then add something new and start over.

Search online, plenty of sites for beginners

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I need some help with C#.

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not to be that guy...but could you give an example as to what it is you need help with. Is it the basics...such as setting your variables, or is it a certain type of coding issue...say if/then statements or do loops or...?

maybe give an example as to a problem you have to do and what is throwing you for a loop.

Well, I'm gonna be perfectly honest with you...it's been damn near 8 years since I did something like that, so I'm not going to be of much help. I think you can read up on case/switch statements to kind of see how to write one...but as others have said, you're just going to have to play with it to really understand it.

Also, if you're having problems with your code not working, make sure your using your step-through options to go through the code line by line to see where it's breaking...or to help understand why it's doing what it's doing.

TL;DR sorry, can't help much

Sounds like you are looking for something like this.

int days = 0;


switch (month)
{
case "September":
days = 30;
break;
case "April":
days = 30;
break;
case "June":
days = 30;
break;
case "November":
days = 30;
break;
case "February":
if((year % 4 == 0 && year % 100 != 0) || (year % 4 == 0 && year % 400 == 0))
{
days = 29;
}
else
{
days = 28;
}
break;
default:
days = 31;
break;
}

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quote:(year % 4 == 0 && year % 400 == 0)Don't need to check 4 if you are also checking 400, though it will obviously still work.

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Next Lesson: Refactoring

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MamouTiger65

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That looks like what he showed another student. The problem is I don't know why to put
if((year % 4 == 0 && year % 100 != 0) || (year % 4 == 0 && year % 400 == 0))

I know that it is a boolean statement but I wouldn't know how to correctly code it. I would never have guessed to put it in that fashion. If that makes sense.

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The problem is I don't know why to put
if((year % 4 == 0 && year % 100 != 0) || (year % 4 == 0 && year % 400 == 0))

I know that it is a boolean statement but I wouldn't know how to correctly code it. I would never have guessed to put it in that fashion. If that makes sense.

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It can be tricky to just bang out a line like that in one go. It might make more sense to break it down into individual expressions and operations, and then figure out how to work those into boolean logic. And you really need to pay attention to your parentheses, and how they are nested.

This is how I would go about solving this problem. I am only concerned with 4 categories of years: those that are evenly divisible by 400, 100, 4, or none of those. So right off the bat I know I'm going to need these:

year % 400
year % 100
year % 4

Because the modulo operator % returns the remainder, I know that I will need to check if these expressions evaluate to 0 (or not), in order to determine if the year is evenly divisible by these numbers. So let's start like this:

if(year % 4 == 0)

So, if the year is, for example, 2096, 2100, 2104, etc., the remainder when divided by 4 is zero, and 0 == 0 is TRUE, so the if statement will execute and set days = 29. But, of course, 2100 will not be a leap year, so we have to fix that:

if(year % 4 == 0 && year % 100 != 0)

So now we put that AND in there, which means the stuff on both sides of the && have to be TRUE in order for the if to execute. So now for the year 2100, when we divide by 100 the remainder is zero, and 0 != 0 is FALSE. Since this test fails, it doesn't matter that the other side of the && is TRUE, the if statement is still FALSE, so the else will catch it and set days = 28. This is great, except now we have to catch the years that are multiples of 400:

if((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0))

Now, if the stuff before the || OR the stuff after the || is TRUE, then the if will execute. So what we've done here is just to add the special case for years that are multiples of 400. The years 2000, 2400, etc will make our if TRUE regardless of what happens on the left of our ||. Likewise, the year 1996, which is evenly divisible by 4 and NOT by 100, will make the entire if be TRUE regardless of what's on the right side of the ||.

And, of course, if the stuff on the left and the stuff on the right are FALSE, only then will our else come into play and set days = 28.



I hope all of this helps, at least a little bit, rather than makes you more confused.

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Korkstand

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