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to a file).

Post in the forum then everyone will benefit from seeing the questions and answers.You have difficulty converting 2378 to 23.78 and 6787 to 67.87?

I also added boundary check code for target buffer, which is not really necessary if we know what we are doing.Similar answers already exist above, I added this one to explain how the following line of code works exactly:It's quiet tricky and not easy to understand, I put the explanation in the comments below:I just wanted to add the following, even if it is slightly off-topic (not standard C), but I find myself looking for it often, and stumbling upon this question among the first search hits.

Maybe you should at least finish the job before calling names on other posters?And a word about comments in source code (not REM, that's BASIC keyword for comments, plese avoid that): comments saying in english what the code is doing is very very bad practice!

I know how to print hex to screen, but I dunno how to store it to variable.Why would you want to?

sprintf(buf,"%x",c);// convert ascii value in hex obj.SendByte(buf[0]); // I don't know command for send byte to xbee but I think you can send byte obj.SendByte(buf[1]); }} my name is IGOR, not AIGOR . Then it calls ToInt32(Char) on each character to obtain its numeric value. A bit helpful. Quote from: PaulS on Feb 19, 2013, 01:14 pm. Let suppose, we have two values in Hexadecimal "64" (100 in Decimal) and "FAFA" (64250 in Decimal). This is not a matter of formatting data, this is a matter of basics of using pointers/array.Thanks for the references. I made this clearer by extracting the conversion code to a separate function. View Profile View Forum Posts and the Hat of Guessing Join Date Nov 2007 Posts 14,336. you should also keep track of the size of the array to make sure it doesnt get larger than the space allocated:For completude, you can also easily do it without calling any heavy library function (no snprintf, no strcat, not even memcpy). End Example #include #include using namespace std; int … So just store it in its native form, char, int, float etc.Thanks! Say, it can be array of pointers each pointing to the buffer for 2-character string (or 3-character, with 'x'). C++ c_str() function along with C++ String strcpy() function can be used to convert a string to char array easily.. But password can change, so … Full Member; Posts: 129; Karma: 18 ; Re: COnvert const char to hex #12 Feb 19, 2013, 01:29 pm. Then it calls ToInt32(String, Int32) to convert the hexadecimal value to a decimal value represented as an int. The only time you need to convert it to hex is when you want to display it somewhare. The buffer has nothing to do with the hex. There is no special type of data type to store Hexadecimal values in C programming, Hexadecimal number is an integer value and you can store it in the integral type of data types (char, short or int). 1.

Nothing really fancy you can find similar code around if you google for it. +1 416-849-8900 x 100 The Linux kernel print function, ... however, these format specifiers do not seem to exist for the standard, user-space Slightly modified Yannith version. You simply need to provide a 2-3 character buffer per each sprintf call, no matter how the buffers are arranged.

@Cecil War: unless my code is bogus using const won't safeguard much except as you say mixing up pointers or using the same pointer for input and output (ok, still possible). CodeProject,

So just store it in its native form, char, int, float etc.Thanks! I should not print kar[i], It should be looks like this.But anyway, I store each hex into buffer.. This example parses a string of hexadecimal values and outputs the character corresponding to each hexadecimal value. Eg "const unsigned char const * p" so that you can make sure that input buffers are not written to.

I want to convert the byte array to a string such that I can print the string using printf:to concatenate to a string, there are a few ways you can do this... i'd probably keep a pointer to the end of the string and use sprintf. It sounds like you're still thinking that hex values are somehow different than non-hex values.

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