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Q: Decimal to Hex using c/c++ ( No Answer,   6 Comments )
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 Subject: Decimal to Hex using c/c++ Category: Computers Asked by: raghu1979-ga List Price: \$5.00 Posted: 03 Nov 2005 10:38 PST Expires: 04 Nov 2005 09:43 PST Question ID: 588461
 ```How to convert a decimal number to hexadecimal number using c/c++ programs ? Is there any built in functions to convert from dec to hex in c/c++ ?```
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 Subject: Re: Decimal to Hex using c/c++ From: jpariag-ga on 03 Nov 2005 11:13 PST
 ```Try this page http://mathforum.org/library/drmath/view/54347.html jpariag-ga```
 Subject: Re: Decimal to Hex using c/c++ From: athar123-ga on 03 Nov 2005 14:37 PST
 ```if you have a number stored in a variable int (or its mutent type) then it is stored in binary format. So when you print to screen (or file) at that time you can also specify in which base you want the number to show up. You can specify %d for decimal and %x for hexadecimal. You can also use itoa(...) function to convert the number to string and specify the base in it. In this case base can be over wide range including decimal and hexadecimal.```
 Subject: Re: Decimal to Hex using c/c++ From: raghu1979-ga on 03 Nov 2005 15:21 PST
 ```Hi, I have used _itoa() to convert the integer to string of base16. But I need some result in 0X2BCF kind of format so that I can assign it directly to a variable of type DWORD. For example, If I pass 12345 to a function, it should return me 0x3039. Is it possible ?```
 Subject: Re: Decimal to Hex using c/c++ From: efn-ga on 03 Nov 2005 23:50 PST
 ```A number of an integer type is just stored as a bunch of bits in the computer. Decimal and hexadecimal representations only get involved when you need to convert to character string representation for interfacing with people. For convenience, the C and C++ languages allow you to write a number either in decimal or in hexadecimal notation with the "0x" prefix, but these notations do not represent different kinds of values. A DWORD is an integer type, so it just deals with values, not character representations. So you can assign 12345 or 0x3039 to a DWORD and you will get the same result either way, because those are just two different ways of writing the same number in the programming language. So the function to convert 12345 to 0x3039 would look like this: DWORD dontdoanything(DWORD input) { return input; } Now if you are asking about getting a hexadecimal *character* representation of a value, that is also possible, but from your last comment, it doesn't look like that is your problem.```
 Subject: Re: Decimal to Hex using c/c++ From: aminvikas-ga on 04 Nov 2005 03:03 PST
 ```As said by efn-ga,A number of an integer type is just stored as a bunch of bits in the computer. Decimal and hexadecimal are the representations used by the user's for better understanding . We can surely write a Functin for doing the task u explained, but i need to know exact details for the functions .We cannot store character data 0x330C in a DWord. Thank you```
 Subject: Re: Decimal to Hex using c/c++ From: bradgoodman-ga on 04 Nov 2005 08:21 PST
 ```int main() { char outStr[256]; int inDec = 65535; sprintf(outStr,"%x",inDec); printf("%d in hex is %s\n",inDec,outStr); }```