In a file I have made:
size_t bb;
bb = 3u;
printf("bb %d\n");
which prints:
bb 2280640
But what is 'u' and why does it print the above number? 7 2226
saneman wrote:
In a file I have made:
size_t bb;
bb = 3u;
printf("bb %d\n");
which prints:
bb 2280640
But what is 'u' and why does it print the above number?
Prints garbage from stack, there is no argument given for %d.
Should be : printf("bb %d\n",bb);
ismo
saneman wrote:
In a file I have made:
size_t bb;
bb = 3u;
printf("bb %d\n");
which prints:
bb 2280640
But what is 'u' and why does it print the above number?
'u' is a suffix to make your literal *unsigned*. It prints what you see
by *pure chance*. You provided the format specification (%d) but no
corresponding argument, so the behaviour of your program is undefined,
it can do whatever it wants. Search the web for "nasal demons" (with
quotes).
V
--
Please remove capital 'A's when replying by e-mail
I do not respond to top-posted replies, please don't ask
In article <8U************ *@read4.inet.fi >, Ismo Salonen
<no****@another .invalidwrote:
saneman wrote:
size_t bb;
bb = 3u;
printf("bb %d\n");
...
Prints garbage from stack, there is no argument given for %d.
Should be : printf("bb %d\n",bb);
That prints 0 on one of my machines (big-endian, 16-bit int). %d specifies
an int, but size_t isn't necessarily an (unsigned) int. Since the subject
and group is C++, not C, the way to print it is
std::cout << bb;
If printf must be used for some reason, cast bb to an int, or better, use
unsigned long:
printf( "bb %lu\n", (unsigned long) bb );
Hi
Ismo Salonen wrote:
saneman wrote:
>In a file I have made:
size_t bb; bb = 3u; printf("bb %d\n");
Prints garbage from stack, there is no argument given for %d.
Should be : printf("bb %d\n",bb);
Even then, %d and size_t don't match. Use %zu for size_t, as it might be
larger than an int.
Markus
On 2008-08-01 09:17:53 -0400, Markus Moll
<ma*********@es at.kuleuven.ac. besaid:
Hi
Ismo Salonen wrote:
>saneman wrote:
>>In a file I have made:
size_t bb; bb = 3u; printf("bb %d\n");
Prints garbage from stack, there is no argument given for %d. Should be : printf("bb %d\n",bb);
Even then, %d and size_t don't match. Use %zu for size_t, as it might be
larger than an int.
Well, yes, non-portably. "%zu" is new with C99, and the C++ standard is
based on C90. The next version of the standard will provide "%zu".
--
Pete
Roundhouse Consulting, Ltd. ( www.versatilecoding.com) Author of "The
Standard C++ Library Extensions: a Tutorial and Reference
( www.petebecker.com/tr1book)
On Aug 1, 6:17*pm, Markus Moll <markus.m...@es at.kuleuven.ac. be>
wrote:
Hi
Ismo Salonen wrote:
saneman wrote:
In a file I have made:
size_t bb;
bb = 3u;
printf("bb %d\n");
Prints garbage from stack, there is no argument given for %d.
Should be : printf("bb %d\n",bb);
Even then, %d and size_t don't match. Use %zu for size_t, as it might be
larger than an int.
Markus
excuse me Markus whats %zu? whats the z stand for?
Anarki wrote:
On Aug 1, 6:17 pm, Markus Moll <markus.m...@es at.kuleuven.ac. be>
wrote:
>Hi
Ismo Salonen wrote:
>>saneman wrote: In a file I have made: size_t bb; bb = 3u; printf("bb %d\n"); Prints garbage from stack, there is no argument given for %d. Should be : printf("bb %d\n",bb);
Even then, %d and size_t don't match. Use %zu for size_t, as it might be larger than an int.
Markus
excuse me Markus whats %zu? whats the z stand for?
It's the C99 format specifier for size_t.
--
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