need help with getchar

**sdogg45** · 02-23-2004

in order to start my program, i need to create a type of menu using getchar and i have no idea where to start. the program is supposed to output this:

Enter P for payment calculation, L for loan calculation, or Q to quit:

and depending on the input runs specific functions in the program. so far, this is what i have (note: i am very new to C to cut me some slack if this looks terrible :P)

Code:

#include <stdio.h>
#include <math.h>

int main()
{
        int c;
        printf("Enter P for payment calculation, L for loan calculation,
or Q to quit:");
        c = getchar();

}

where am i supposed to go from here? i figure i can use an if statement if getchar returns an integer, but what values should i expect for P, L, and Q? am i even thinking about this right?

**Edward** · 02-23-2004

Code:

c = getchar();
if (c == EOF || (c != 'P' && c != 'L' && c != 'Q')) {
    // Handle bad input
}
// Use c

**Hammer** · 02-23-2004

... or use a switch statement

Code:

int c = getchar();

switch (c)
{
  case EOF:
    /* Handle EOF */
    break;

  case 'p':
  case 'P':
    /* Handle P and p */
    break;

  default:
    /* Handle anything else */
    break;
}

**c99** · 02-25-2004

Originally posted by Hammer
... or use a switch statement

Code:

int c = getchar(); switch (c) { case EOF: /* Handle EOF */ break; case 'p': case 'P': /* Handle P and p */ break; default: /* Handle anything else */ break; }

That's really bright testing for 'p' twice. How embarrassing.

**quzah** · 02-26-2004

Originally posted by c99
That's really bright testing for 'p' twice. How embarrassing.

How about actually looking at a C book for starters, then you'll have a clue as to what's acutally going on here. All of your posts I've read you've provided nothing useful, and your attempts at wit are falling short, so don't waste your time.

Now, for the uneducated, this means you, they're testing for both upper case and lower case. So yes, it was bright. It saves a function call to tolower or toupper, and is a faster solution. However, the only problem here was a typo.

But I'm sure Hammer doesn't need me defending them. If you're trying for the position of resident $$$$$$$, that position is filled. Go some place else.

Quzah.

**swoopy** · 02-26-2004

>However, the only problem here was a typo.

I don't even think there was even a typo. There's a lower case p and an upper case p. Unless of course the post has been edited.

**quzah** · 02-26-2004

Originally posted by swoopy
>However, the only problem here was a typo.

I don't even think there was even a typo. There's a lower case p and an upper case p. Unless of course the post has been edited, which is impossible to know.

You're right. There is no typo. It's my font. I didn't think there was a typo, then doubted myself (due to the font size I'm using). Thanks for pointing that out. On a side note, the post couldn't have been edited. The board comments the fact that it's been edited if you do it after more than a few seconds (maybe a minute tops) of the original post. Looking at the time of C99's post puts it hours later than Hammer's.

Quzah.

**c99** · 02-26-2004

quzah.

Get off my case you uneducated, clueless, insignificant peon.

If I see a bug, I will point it out. If I see a typo, I will also point that out.

And why not? I've endured members pedantics thus far.

Resident $$$$$$$? Filled? Don't worry I'm not after your position.

case 'p':
case 'p':

That might well be a typo, at least now the thread poster is notified
and can edit the post.

**quzah** · 02-26-2004

Originally posted by c99
Get off my case you uneducated, clueless, insignificant peon.

If I see a bug, I will point it out. If I see a typo, I will also point that out.

And why not? I've endured members pedantics thus far.

Resident $$$$$$$? Filled? Don't worry I'm not after your position.

case 'p':
case 'p':

That might well be a typo, at least now the thread poster is notified
and can edit the post.

It isn't a typo. Look again. It's upper case and lower case, as I originally thought. You are wrong on both accounts. It is not a bug. It is not a typo. You are simply wrong.

Quzah.

**c99** · 02-26-2004

quzah.

Make up your mind.

**kermit** · 02-26-2004

Originally posted by c99
quzah.

Get off my case you uneducated, clueless, insignificant peon.

If I see a bug, I will point it out. If I see a typo, I will also point that out.

And why not? I've endured members pedantics thus far.

Resident $$$$$$$? Filled? Don't worry I'm not after your position.

case 'p':
case 'p':

That might well be a typo, at least now the thread poster is notified
and can edit the post.

It is not a typo - copy and past each p individually into your favourite editor, placing them side by side, and you will see that indeed there is an upper case 'P' and a lower case 'p'.

It kind of looks like you are still burned about the other night, C99. Too bad you have not gotten over that yet. You are not helping yourself by being a troll.

**Thantos** · 02-26-2004

Is c99 going for the record for the fastest banning?

**c99** · 02-26-2004

Kermit.

No, I will not copy and paste code into my favorite text editor just
so I can properly view what it actually is.

Hopefully the forum moderators can quite plainly see that the
forum font needs to be re-thought. Remember C is case sensitive
so therefor so should be the forum fonts.

I've witnessed two occassions now in two days whereby members
have had trouble reading the font.

And Thantos, care to explain your comment, or is that just a cheap
shot across by bowel.

**quzah** · 02-26-2004

If you're including me in the "two cases", leave me out. My font is manually over-ridden, different from the forum defaults.

Quzah.

**kermit** · 02-26-2004

Well then C99, if you are unwilling to take the time to see if what you are typing is correct (ie, that Hammer used two small 'p's instead of a capital and a small) then maybe you should also not take the time to post about other people's alleged mistakes.

If you have such a great problem with the fonts on the board, I am sure you can private message one of the lead mods with a request that something be done about that issue.

~/

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