I take it you didn't change the printf to use %f - that looks like a floating point number printed with %d.
The reason the language has while and do-while and a few other constructs is exactly to avoid having goto's. They do the same thing in a more easy to read fashion.
--
Mats
Compilers can produce warnings - make the compiler programmers happy: Use them!
Please don't PM me for help - and no, I don't do help over instant messengers.
...................
Last edited by ki113r; 09-05-2007 at 10:02 AM.
Yes, if you enter f (or any other non-float-number stuff) as part of your input, then it will get stuck - like I said, scanf() can be very temperamental, and will quite easily get confused by "bad input".
If it is a requirement to actually be able to tolerate user errors, then fgets() is the right way to go.
--
Mats
Compilers can produce warnings - make the compiler programmers happy: Use them!
Please don't PM me for help - and no, I don't do help over instant messengers.
Ok , well ill get some sleep now, and ask my tutor about using fgets , thanks a lot for your help
Turns out the user must enter the f value , and the program must process the whole thing . I think the way I will handle this is to use string compare. I think my tutor would prefer that to fgets. When I askd him this is the reply I rceeived :
> Am I allowed to use a more advanced way if it simplifies the
> procedure ?
No. Look at style ( that he teaches in lectures and practicals ) NOT the code you use.
What do you think is easier and more logical way for a beginner to use for my problem , to convert the input to a string use string compare to compare the apertures with valid values , or to use fgets ? We haven't been taught neither of the ways . Any suggestions ?
well, I'm thinking since the string you get for aperture is *always* in the form: f1.2 f1.4, etc, you have an f followed by a number. Thinking further, if you had a char array and the you wanted to convert that to a number via stroll(), you can't do it because the first char is not a number. So you could advance the array by one and then use stroll()...
QuantumPete
"No-one else has reported this problem, you're either crazy or a liar" - Dogbert Technical Support
"Have you tried turning it off and on again?" - The IT Crowd
Maybe there's a way to simply ignore the input of the first character , and store the rest in a string ?
There is a dead simple way; but why store the rest in a *string*, if you can ignore the first character and read the rest as a *float*???
QuantumPete
"No-one else has reported this problem, you're either crazy or a liar" - Dogbert Technical Support
"Have you tried turning it off and on again?" - The IT Crowd
If I can store it as a float it's even better . How would I do that ?Originally Posted by QuantumPete
I'll give you an example and then you can work it out from there, I'm sure
You could also use fgets to get the input as a string and then do something very similar with sscanf to get the float, like matsp said. I reccomend you go to your department library and get "The C Programming Language" by Kernighan and Ritchie (Second Edition). All this stuff is explained in there and will help you to fix simple problems by yourselfCode:float amount = 0.0f; printf ("Enter the price like so: £100.23\n"); scanf ("£%f", &amount); printf ("You entered £%f\n", amount);
QuantumPete
"No-one else has reported this problem, you're either crazy or a liar" - Dogbert Technical Support
"Have you tried turning it off and on again?" - The IT Crowd
Mmm, 85 replies and we seem to be going round in circles. The question shouldn't be this hard.
@ki113r, I would suggest you start a new thread, with your latest code and whatever specific questions you still have outstanding.
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.
Simple and effective I like itI'll give you an example and then you can work it out from there, I'm sure
You could also use fgets to get the input as a string and then do something very similar with sscanf to get the float, like matsp said. I reccomend you go to your department library and get "The C Programming Language" by Kernighan and Ritchie (Second Edition). All this stuff is explained in there and will help you to fix simple problems by yourselfCode:float amount = 0.0f; printf ("Enter the price like so: £100.23\n"); scanf ("£%f", &amount); printf ("You entered £%f\n", amount);
QuantumPete
You should also be seeing your tutor or whoever for help, while is place is great it shouldn't be your sole source of information.
How would I limit the printf ouput to only 1 decimal when it prints out the float? I tried searching the FAQ to no avail
"The C Programming Language" by Kernighan and Ritchie (Second Edition) page 153/154
QuantumPete
"No-one else has reported this problem, you're either crazy or a liar" - Dogbert Technical Support
"Have you tried turning it off and on again?" - The IT Crowd
