CODEWITHSUNDEEP
cscanf
user3813238
user3813238

Reputation:

C - scanf unsigned char

I am trying to use scanf() for reading an unsigned char value with %hhu, but the compiler returned me:

error: unknown conversion type character 'h' in format
 [-Werror=format]| // line 3 error: too many arguments for format
 [-Werror=format-extra-args]| // line 3

With this following code:

printf("Enter a number: ");
unsigned char nb;
scanf("%hhu", &nb); // line 3
printf("Number: %u\n", nb);
return (nb);

Upvotes: 7

Views: 2719

Answers (1)

P.W
P.W

Reputation: 26800

A discussion on this issue can be found here. This is specific to MinGW.
From this comment in the discussion the issue is identified as:

This is most likely related to bug https://sourceforge.net/p/mingw-w64/bugs/652/ in that the include order and compiler driver actually screws things up with respect to C standard output and format specifiers.

And is proposed solution is:

to always define __USE_MINGW_ANSI_STDIO so that the newer ansi format specifiers can be used and to ensure that long double (at least) is not passed between MSVC compiled and gcc compiled code.

Upvotes: 1

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