Function for converting HEX to DEC?

m_mun

Hallo all, Is there any single function, which convert hex number to decimal number. I will pass just only two characters like "3D" as a string. Thanks all Regards Shaheen

Lost User

strtoul ANSI C/C++ function is possible answer of your question. :) [EDIT] Broken link

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modified on Wednesday, August 26, 2009 7:26 AM

m_mun · modified on Wednesday, August 26, 2009 7:26 AM

Thank for for reply. I am just try it

m_mun · modified on Wednesday, August 26, 2009 7:26 AM

Can u give me a example. I have try it but not works.

Lost User

Here is basic one: printf("%u",strtoul("5A", NULL, 16)); ... and the output is 90.

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Cedric Moonen

There is an example on the page that was given to you. By the way, "not works" is not really a clear description of the problem, it could be anything...

Cédric Moonen Software developer
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Luc Pattyn

Hi, IIRC the string scanning function sscanf can do that for you like so:

int result;
sscanf("3D", "%2x", &result);

:)

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m_mun

Thanks it works

CPallini

const char s[] = "3D";
int i = (s[0]<='9' ? s[0]-'0': s[0]-'A'+10) << 4 | (s[1]<='9' ? s[1]-'0': s[1]-'A'+10);

:)

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Luc Pattyn

now that will choke on lower-case hex numbers, won't it? :)

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