Improve company productivity with a Business Account.Sign Up

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 411
  • Last Modified:

easiest way to get Decimal to Hex in c++?

if anyone could write a quick code segment or explain the easiest way to convert decimal integers to hex in c++ that'd be great. thanks.
0
drumrboy44
Asked:
drumrboy44
1 Solution
 
PerfunctionCommented:
0
 
raj3060Commented:
Try this link:
http://www.gidforums.com/t-2615.html
They have very good comments and explanation.
0
 
Jaime OlivaresSoftware ArchitectCommented:
you can use c++ sstream library. Something like:

#include <iostream>
#include <sstream>
#include <string>

using namespace std;

// somewhere in your code
    int testnumber = 100;
    stringstream ss;   // this object will do the conversion

    ss << hex << testnumber;   // 'hex' will format number to hex format
    cout << ss.str();  // display result  str() method return the hex string, you can assign it to a 'string' object
0
What Kind of Coding Program is Right for You?

There are many ways to learn to code these days. From coding bootcamps like Flatiron School to online courses to totally free beginner resources. The best way to learn to code depends on many factors, but the most important one is you. See what course is best for you.

 
Julian HansenCommented:
I am assuming you want to do this for display purposes - for any other purpose there is not really a conversion because 0xFF = 255 = 11111111.

Output to the console

printf ( "%x", decimalnumber) ;

save to a string

sprintf ( str, "%x", decimalnumber ) ;
0
 
RuskialtCommented:
If your decimal number (and integer) is in a string first convert the number to an int, then format the variable to another string

char pInteger[] = "256"; //my integer string
char pHex[256]; //destination string
int nValue;

if( sscanf( pInteger , "%d" , &nValue ) == 1 ) //returns number of converted elements
{
   sprintf( pHex , "0x%08x" , nValue );
}

=> pHex now holds "0x00000100"

CString has a Format() function that doest excactly what sprintf() does, in case you use MFC. Also if your source string is in a CString, you can use it as the first parameter in the sscanf() statement, because CString's can be seen as const char*'s

leave the "0x", and the "08" if you dont want the prefix and the 0-padding and the 8 characters wide field
0
 
Julian HansenCommented:
Just a minor point - if you are going to convert from a string you could also use atoi or atol

char dec[] = "1234" ;
char hex[10] ;
int x ;

x = atoi ( str ) ;
sprintf ( hex, "0x%08x", x ) ; // adopting Ruskialt's formatting options here


0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Featured Post

Get expert help—faster!

Need expert help—fast? Use the Help Bell for personalized assistance getting answers to your important questions.

Tackle projects and never again get stuck behind a technical roadblock.
Join Now