[C] Decimal to Hexadecimal conversion as string help!

[~Matt~]

I need to convert a decimal number into a hexadecimal number with "0x" beforehand as the program I am writing needs to be able to create a bitmap image by writing in each hex value. I have written th

My current code is shown below.

#include <stdio.h>
#include <math.h>

void decToHex(int decimal);

char bitCode[4]="0x";

int main (int argc, const char * argv[])
{
    decToHex(254);
    puts(bitCode);
    return 0;
}

void decToHex(int decimal){
    char hex[5];
    char hexArray[]={'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
    int i=1;
    while(decimal>0){
	    hex[i]=decimal%16;
	    hex[i]=hexArray[hex[i]];
	    decimal=floor(decimal/16);
	    i--;	    
    }
    bitCode[2]=hex[0];
    bitCode[3]=hex[1];
}
[/CODE]

However when I want to put my bitCode into an array as follows:

[CODE]
unsigned char drawing[]={bitCode,bitCode,bitCode};
[/CODE]

I get an error that says:[b]incompatible pointer to integer conversion initializing 'unsigned char' with an expression of type char[4][/b]

I think i need to somehow convert it to a string to work. Please tell me what i am doing wrong!

[Lant]

Why reinvent the wheel when you could use sprintf?

Untested:

int n = ?;
char buffer[INT_MAX / 16 + 1 + 2];
sprintf(buffer, "%#X", n);

Your error was caused by you trying to cast a "char" to an "unsigned char" which requires an explicit cast

[boogerjones]

void decToHex(int decimal) {
    static const char hexArray[] = "0123456789ABCDEF";
    bitCode[2] = hexArray[(decimal >> 4) & 0xF];
    bitCode[3] = hexArray[decimal & 0xF];
}
[/CODE]

[~Matt~]

Thanks for your help guys. I realised that you don't need to convert it, as C treats hexadecimal, decimal as the same thing