checking the user entry an close C program

adolphina · 03-05-2017, 01:34 AM

Quote:

Originally Posted by astrogeek

In addition to what pan64 has said, your if ( a==0 ) test also appears to be incorrect.

As you have never answered the question as to whether you intend to use C or C++, we will assume C++ based on your example code.

I would suggest that you should work through some online tutorials to learn your way around the language before trying to write and debug your own examples.

There is a sticky post at top of the Programming forum for C/C++ Tutorials, use it! And this page has a really good set of basic tutorials for both C and C++, just start at top of the list and work your way down!

Put some effort into understanding how it all works, not just in making it work.

And learn to use the man pages for common language constructs such as conditionals, loops and basic I/O, and library functions like strtol, scanf, etc. You have the documentation for the language and standard libraries built-in to most GNU/Linux distributions - learn to understand it and use it.

And try to understand and use the advice and examples already given by others. We are happy to help, but you must actually learn from the help provided.

I totally agree with u, i would try to lern by my own before coding something new, thanks.

Xeratul · 03-05-2017, 08:06 AM

Quote:

Originally Posted by adolphina

hello. I am new to C language.
i ve got two questions:
1) how can i check that user entered the number (float or int but not) some letters?
for example:

Code:

error1:
cout << "Enter a" << endl;
cin >> a ;
if a is float or int
/do something/
if a is a string
/it is an error. Goto error1;/

and the second question:
2) how i may close a C program runnig in terminal (The OS is linux mint)?
thank You for yor answers!

I have the feeling that you maybe are trying too fast the next level.
maybe this very basic program for beginners might be helping you: https://raw.githubusercontent.com/sp...le-x86-bin.png

I would recommend to start with simple codes, such as hello world, and look at this good book: https://archive.org/details/TheCProg...geFirstEdition

for your float, it is not that easy to start. You may work with a loop for controlling each chars, if you convert it before to a char.

NoStressHQ · 03-06-2017, 06:41 PM

Quote:

Originally Posted by Xeratul

I have the feeling that you maybe are trying too fast the next level.

Funny because I'd say the same about ncateditor

... Well this might be bigger than you think, and seeing the code, you might not be ready for a huge project like that neither

.

But sorry, I don't want to "kill" your motivation, it's good to try and you'll learn a lot of things, I say that because you might have problem recruiting "contributors" the way it is...

(BTW: I can understand the nostalgia about turboc, I've also started with borland tools, and I cherrish them in my memory

).

Bests.

Garry.