how to convert a char or string to hex?

Question

Hi,

I want to convert a string to hexadecimal in vc++. Is there any built in function in vc++ to do this. I am working on visual studio 2008. Just like VB has some in built some in built function. otherwise if there are no built in functions, any code which anyone can share is appreciated.

Thanks & Regards,
P.Karthik

Answer 1

strtol is used to convert string to long integer right?

check out the following link as reference:

http://www.cplusplus.com/reference/clibrary/cstdlib/strtol/

Answer 2

Hi Karthik,

Try this:

string input = "Hello World!";
char[] values = input.ToCharArray();
foreach (char letter in values)
{
    // Get the integral value of the character.
    int value = Convert.ToInt32(letter);
    // Convert the decimal value to a hexadecimal value in string form.
    string hexOutput = String.Format("{0:X}", value);
    Console.WriteLine("Hexadecimal value of {0} is {1}", letter, hexOutput);
}

 

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Regards, http://shwetamannjain.blogspot.com

Answer 3

Hi swetha jain,

 

What you told looks like C# code. I am working on vc++ not C#. Will this work in vc++!!!

Answer 4

Hi,

I am not sure about VC++. But check out this link:

http://www.codeguru.com/forum/showthread.php?t=231054

 

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Regards, http://shwetamannjain.blogspot.com

Answer 5

or you can try converter to convert C# code to VC++

http://tangiblesoftwaresolutions.com/

Answer 6

Conversion to int32 is done perfectly but when i try to

string ^ hexOutput = System::String:Format("{0:2X}", value);

print double precision hexadecimal value it is not returning proper value. It is just returning 2X as output

Answer 7

Why you appended 2 with X.

Try it without 2 as

string ^ hexOutput = System::String:Format("{0:X}", value);

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Regards, http://shwetamannjain.blogspot.com

Answer 8

Hey sorry i am trying to print hex value to output file as 0x46 something like that so. If the value it is returning is lessthan 10 then i need to append another 0 na. Its like getting 2 values after a decimal point for float values. thanks for the help. Got it finally. its {0:X2} rather {0:2X}. The former gives hexadecimal where as later gives 2X as output all the time. I appreciate your help Shweta  Jain. Thanks a lot.

Answer 9

Try this code.

#include<iostream.h>

int main()
{
unsigned long temp=0, counter=0, OutPut=0;
char Letters[10]= "abcd";                        // letter characters

cout<<Letters;         
for (counter=1; counter<=strlen(Letters); counter++)  
{
temp = Letters[counter-1];          // get character of char

OutPut=OutPut +temp;                 // add result (temp) to OutPut
}

OutPut=OutPut ^ 1234;  //means1234 h  

cout<<OutPut<<"\n";   // decimal output by default
cout<<hex<<OutPut;    // Hex output

return 0;
}

Answer 10

Thanks Zain_Ali Got it.

for each(wchar_t ^ each_char in string)

{

int dec_value = System::Convert::ToInt32(each_char);
String ^ hex_value = System::String::Format("{0:X2}",dec_value);

}

hex_value is the converted hex of each character.

Answer 11

What you told looks like C# code.

This is a C# forum.

Answer 12

Thank you all for your time and effort!

Hi Karthik,
Welcome to the MSDN forum!

You are more likely to get in touch with more VC++ experts in the Visual C++ forum.

Visual C++ Developer Center -> Visual C++ Forums -> Visual C++ General.

Thank you for your understanding!

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Yoyo Jiang[MSFT]
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