Command Line String Conversion?

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.

What's wrong with sscanf()?

Edit2: Removed bullsh...

Code:

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

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

Code:

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

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

Code:

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

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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.

AD: shouldn't it be...?

Code:

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

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(I needed such changes for gcc anyways.)

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

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

The above provided what I need.

Thanks!

Quote:

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Originally Posted by Ancient Dragon

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

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