convert hex to dec or dec to hex

[Jiko]

Are there any functions I can use or do I have to write them myself? All kind of convertions between hex,dec,bin,ASCII.
I have strings with 32 byte that i count and do a checksum in the end.
ex. 0102030405060708090A0B0C0D0ECS
I also convert 2 byte to 1 and represent them in ASCII.
ex. 86 (1000 0110) => E in ASCII
I do like this now:
high = buffer.GetAt(i);
low = buffer.GetAt(i+1);
if(high >= 65)
high = high - 55;
else
high = high - 48;
if(low >= 65)
low = low - 55;
else
low = low - 48;
high = high << 4;
high = high + low;
i++;
summa += high;
I convert many times between hex to dec.
Thank you if you can help me
Martin

 

[palbano]

to convert intrinsic numbers to string representations in different base notation:

_itoa(), _uitoa(), _ltoa(), _ultoa()

to convert strings representing numbers in any base to a intrinsic number:

strtod(), strtol(), strtoul()

hope that helps
-pete

 

[awingnut]

I don't think I understand what you are trying to accomplish. What variables are you converting from hex to dec, why and where? I also don't understand your checksum calculations.

summa+=atio(buffer[i]); //add byte to checksum
summa=summa && 0xff; //mask off any carry

I am probably completely missing what youare trying to. Please clarify.

 

[awingnut]

Thinking some more maybe:

summa+=atio(buffer); //add byte to checksum

should be:

summa+=(int)buffer; //add byte to checksum

depending on what your data in 'buffer' represents.

 

[BoulderBum]

Try messing with std::hex and std::dec with streams. E.G.

int myInt = 10;

cout << &quot;hex: &quot; << std::hex << myInt << ' '
<< &quot;dec: &quot; << std::dec << myInt << endl;

 

[Kathless]

#define F binary # here
#define f binary # here
#include <iostream>
using namespace std;
int main()
{
int numOne;

cout<<&quot;Enter a number in hex: &quot;;
cin>>hex>>numOne;

if(numOne<=1)
cout<<&quot;Nope&quot;;
if(numOne>=f)
cout<<&quot;Nope&quot;;
else
cout<<&quot;Your DEC conversion is:&quot;<<numOne;
return 0;
}

This what I did, and it worked