Hexadecimal math in vc++

[Shadowboxer.org]

I need to do some math on a cdkey for an msi, I essentially have 7 blocks of
numbers that are hex-encoded by Vb.net

eg FFFF = 65535

what I need to do is get the number (decimal) back from the String (hex)

the items are stored in character arrays sA[4] and sB[9]

I need to run a formula on the two values but first I need to get their
numeric representation out. is there any built in function that can do this?

in vb it's simple:

key = "FDE4"
dim hexString as integer = cInt("&H" & key)

essentially casting, is there an equivalent method in vc7.

I need to stay away from the CLR since this is a setup dll and there may be
no Framework on the machine.

Thanks Bunches! -Shadow

[Hendrik Schober]

Shadowboxer.org <shado...@nospam.shadowboxer.org> wrote:
> [...]

> I need to run a formula on the two values but first I need to get their
> numeric representation out. is there any built in function that can do this?

#include <sstream>

int readFromHex(const char* sz)
{
int i;
std::istringstream iss( sz );
iss >> i;
if( !iss ) {
throw error(sz);
}
return i;
}

> [...]
> Thanks Bunches! -Shadow

Schobi

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I'm Schobi at suespammers dot org

"Sometimes compilers are so much more reasonable than people."
Scott Meyers