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TorakTu wrote: Aren't there licenses on those libraries though ? If by some LONG shot I was able to sell my tiny OS for what ever reason.. just for fun.. wouldn't I be bound to pay a fee to the creators of those said libraries ? I'm trying to avoid that.

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a = 0
while(n != 0)
   answer[a] = n mod b
   n /= b
   a++

Convert the number to a binary, then bring it back in as a type of string by converting it back to ASCII into the end of the array as an appended byte. I know what I'm trying to say, I just probably am not clear about the way I am saying it. I'll have to experiment with this idea.

---------------------------------------------
|   |   |   |   |   |   |   |   |   |   |   |
---------------------------------------------

---------------------------------------------
|   |   |   |   |   |   |   |   |   | 53|   |
---------------------------------------------

---------------------------------------------
|   |   |   |   |   | 49| 50| 51| 52| 53|   |
---------------------------------------------

-------------------------
| 49| 50| 51| 52| 53|   |
-------------------------

std::string s{"hello"};
s += boost::lexical_cast<std::string>(1);

I am fairly knowledgeable with C.

• char * is not the string type in C. C doesn't have a string type.
• char is not ASCII.

dozniak wrote:

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std::string s{"hello"};
s += boost::lexical_cast<std::string>(1);

'ere you go.

Griwes wrote:Did you mean std::to_string instead of so much more verbose lexical cast?

Love4Boobies wrote:This forum has reached a new low. Two things worth pointing out:

• char * is not the string type in C. C doesn't have a string type.
• char is not ASCII.

dozniak wrote:

Code: Select all

std::string s{"hello"};
s += boost::lexical_cast<std::string>(1);

'ere you go.


PS. You can convert int to char because char is an integer type, string is not. This is not python, and compiler will not do things for you.

There's at least one lie in here. I recommend you learn C.

m12 wrote: It depends on the library. Using a GPL library is NOT the way to go if you ever intend to have a remote chance of selling your os, as it requires projects using it to be open source and freely distributed. (If I'm not mistaken, the freestanding ones are exempt from this rule). Other libraries will allow you to use them with permission or attribution (Putting the author's name in an easily visible spot in your os - such as an about dialog). "Public domain" or "Copyright waived" libraries can be used for any purpose, commercial or personal, with or without attribution, etc, et al.

BTW, I am not a lawyer and am not offering legal advice.

Convert the number to a binary, then bring it back in as a type of string by converting it back to ASCII into the end of the array as an appended byte. I know what I'm trying to say, I just probably am not clear about the way I am saying it. I'll have to experiment with this idea.
This would print your number backwards, but yes this is the standard method. What I do is make an empty character string large enough for the largest possible value + 1 and zero it (in base 10, 32 bits, unsigned):

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---------------------------------------------
|   |   |   |   |   |   |   |   |   |   |   |
---------------------------------------------

Then, mod by 10 for the last digit and divide to get rest. Place the % value + 48 in the second to last position. (12345 is the number):

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---------------------------------------------
|   |   |   |   |   |   |   |   |   | 53|   |
---------------------------------------------

Continue:

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---------------------------------------------
|   |   |   |   |   | 49| 50| 51| 52| 53|   |
---------------------------------------------

trim the beginning of the array:

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-------------------------
| 49| 50| 51| 52| 53|   |
-------------------------

And you now have a null terminated string with correct encoding ready for whatever it's being used for.

PS, bases > 10 are a bit more difficult. That's your homework.

EDIT: zeroes are represented as a space for readability.

know that I can't use libraries. You are showing library functions there that I can't use.

As for my knowledge of C, I would appreciate it if you keep your snide remarks to yourself. Your comment is not helpful by any means.

dozniak wrote:

know that I can't use libraries. You are showing library functions there that I can't use.

If you want any sort of reusable functionality you have to write those libraries yourself (or port something like PDCLib).

As for my knowledge of C, I would appreciate it if you keep your snide remarks to yourself. Your comment is not helpful by any means.

It should be helpful. You're trying to look like you know C, but your attempt to sum together a string and a char clearly shows you're not. At least I know who's the liar here.

TorakTu wrote:

dozniak wrote:PS. You can convert int to char because char is an integer type, string is not. This is not python, and compiler will not do things for you.

There's at least one lie in here. I recommend you learn C.

If you had bothered to read this thread, you would know that I can't use libraries. You are showing library functions there that I can't use. As for my knowledge of C, I would appreciate it if you keep your snide remarks to yourself. Your comment is not helpful by any means.

Combuster wrote:

TorakTu wrote:

dozniak wrote:PS. You can convert int to char because char is an integer type, string is not. This is not python, and compiler will not do things for you.

There's at least one lie in here. I recommend you learn C.

If you had bothered to read this thread, you would know that I can't use libraries. You are showing library functions there that I can't use. As for my knowledge of C, I would appreciate it if you keep your snide remarks to yourself. Your comment is not helpful by any means.

Not knowing that you know is best.
Thinking that you know, while you don't, is a disease.
- Confucius (IIRC).



You demonstrated that you do not know basic C. Period. You can start a fight over it but that only causes more hostility rather than more support.

Complaining about not having a library: the functions are well defined and little more than stock utilities for those things programmers would be guaranteed to end up writing over and over otherwise. Especially implementing string functions should be a really dull task for someone who knows how the fundamentals work.

TorakTu wrote:As I stated right up front, I have a fairly good knowledge, but apparently not enough. I said this in my very first post.

BUT.. I try to add j with a to a string and the compiler complains.. big time. It says ( incompatible types when assigning to type 'char[80]' from
type 'char *' ). So I am confused. OR I just don't know how to add a "byte" to a string.

well so I am guessing your saying to put ' ' around the number 1 .. I tried that. it didn't convert it to character to be able to use in a string. Which is what i'm trying to do.

dozniak wrote:

TorakTu wrote:As I stated right up front, I have a fairly good knowledge, but apparently not enough. I said this in my very first post.

Sorry, here we're getting to what I'm trying to tell for the good few posts - You Do Not Know C. Simple as that.

You started the thread by stating that you do not know anything about fundamental C types and how they are supposed to work.

I didn't want to quote you, but come on:

BUT.. I try to add j with a to a string and the compiler complains.. big time. It says ( incompatible types when assigning to type 'char[80]' from
type 'char *' ). So I am confused. OR I just don't know how to add a "byte" to a string.

And as Love4Boobies correctly wrote, there isn't even a string type in C, only compiler-assisted kludge. But it has its own properties and features, and you clearly Do Not Know Anything about it.

TorakTu wrote:m12 gave me the answer I needed.

dozniak wrote:

TorakTu wrote:m12 gave me the answer I needed.

He did as close as possible to help you, just follow his advice instead of spending time defending something you're not so sure about. Good luck.