Command Line String Conversion?

[sabreman]

I have a hex value that is entered on the command line.

./test 0x50800460280250a9

What would be the best way to convert /parse? I need to use this hex value.

[TactX]

What's wrong with sscanf()?

Edit2: Removed bullsh...

[bithub]

int i = strtol(argv[1],NULL,0);

[Ancient Dragon]

That number is too big for any C normal size integer 64-bit or smaller. This compiles but displays the wrong number

int main(int argc, char* argv[])
{
	unsigned _int64 n = 0x50800460280250a9;
	printf("%u64\n", n);
	return 0;
}

[filker0]

Assuming that your compiler supports long long ints, something like:

long long cmdval = strtoll(argv[1], NULL, 0);

will work for values that can be expressed in 64 bits. Values beyond that must be handled using arbitrary number packages, which are not a standard part of the C library.

[Dave_Sinkula]

AD: shouldn't it be...?

   unsigned __int64 n = 0x50800460280250a9;
   printf("%I64x\n", n);

(I needed such changes for gcc anyways.)

[sabreman]

>>int i = strtol(argv[1],NULL,0);

unsigned long long i = strtoull ((argv[1],NULL,16);

The above provided what I need.

Thanks!

[cwr]

That number is too big for any C normal size integer 64-bit or smaller.

A long long is at least 64 bits, capable of holding values upto at least 0x7FFFFFFFFFFFFFFF. This is greater than 0x50800460280250a9.