Thread: how to convert a binary table to hexadecimal value

i need to code a function that converts an array of 64 bits into a hexadecimal value, the one is tested gives me correct value except for the last hexadecimal letter, can anyone tell me why is this happening or provide me a solution ? thank you in advance

Code:

#include <iostream>
#include <stdio.h>
#include <conio.h>
#include <fstream>
#include <cstdlib>
#include <string>
typedef unsigned __int64 Ebyte;
#define length 64


void to_tab(Ebyte cle,int tab[])
{
    for(int i=0;i<length;i++)
        tab[i]=(cle >> i) & 0x1;
}


Ebyte to_hex(int T[64])
{
    Ebyte temp=0;
    for(int i=0;i<64;i++)
        temp+=T[i]*pow(2,i);
    return temp;
}


void main ()
{Ebyte cle=0xabcdef2748493956,cle2;int test[64];
to_tab(cle,test);printf("la table est :\n");
for(int i=0;i<64;i++)
{if(i%8==0) printf("\n");printf("%d\t",test[i]);}
cle2=to_hex(test);
printf("\nhex est :    %I64x",cle2);
getch();
}

thank you very much

ohh it did not work :/

i didnt quite know to to set bits using the <<, i'll keep trying bro, ty

problem not solved, same problem :/

That's not converting the number to hex though, it's converting an array with binary digits in it to a... binary representation :/

I think you've probably misunderstood what you're trying to do

Code:

#include <iostream>
#include <stdio.h>
#include <conio.h>
#include <fstream>
#include <cstdlib>
#include <string>
typedef unsigned __int64 Ebyte;
#define length 64


void to_tab(Ebyte cle,int tab[])
{
  int i;
  for(i=0;i<length;i++)
    tab[i]=(cle >> i) & 0x1;
}


Ebyte to_hex(int T[64])
{
  Ebyte temp=0;
  int i;
  for(i=0;i<64;i++)
  {
    Ebyte t = T[i];
    t <<= i;
    temp |= t;
  }
  return temp;	// not working
}


void main()
{Ebyte cle=0xabcdef2748493956,cle2;	// testing to_hex
  int test[64];
  int i;
 
  to_tab(cle,test);
   
  printf("la table est :\n");
  for(i=0;i<64;i++)
  {
    if(i%8==0) 
      printf("\n");
    printf("%u\t",test[i]);
  }
  cle2=to_hex(test);
  printf("\nhex est :    %llx",cle2);
  getchar();
}

any help ???

I have no idea what you're trying to do... your current seems pretty pointless to me (even if it worked).

Maybe make a post describing *exactly* what you want to achieve.

Originally Posted by thefirstone92

any help ?

It's working when I compile it. What do you need help with? To fix a warning I changed: tab[i]=(cle >> i) & 0x1; to tab[i]=(int)((cle >> i) & 0x1); , but the code works as shown in post #10.