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Printing 1 to 1000 without loop or conditionals
...it };
printf("%d\n", j);
ft[j/1000](j + 1);
}
int main(int argc, char *argv[])
{
f(1);
}
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edited Apr 30 '11 at 11:53
...
TCP 的那些事儿（下） - 更多技术 - 清泛网 - 专注C/C++及内核技术
...己的特点来关闭）
setsockopt(sock_fd, IPPROTO_TCP, TCP_NODELAY, (char *)&value,sizeof(int));
另外，网上有些文章说TCP_CORK的socket option是也关闭Nagle算法，这个还不够准确。TCP_CORK是禁止小包发送，而Nagle算法没有禁止小包发送，只是禁止了大...
How do you detect where two line segments intersect? [closed]
... intersect the intersection point may be stored in the floats i_x and i_y.
char get_line_intersection(float p0_x, float p0_y, float p1_x, float p1_y,
float p2_x, float p2_y, float p3_x, float p3_y, float *i_x, float *i_y)
{
float s1_x, s1_y, s2_x, s2_y;
s1_x = p1_x - p0_x; s1_y = p1...
What is in your .vimrc? [closed]
...ho doesn't like autoindent?
set autoindent
" Spaces are better than a tab character
set expandtab
set smarttab
" Who wants an 8 character tab? Not me!
set shiftwidth=3
set softtabstop=3
" Use english for spellchecking, but don't spellcheck by default
if version >= 700
set spl=en spell
s...
Using std Namespace
...
@xtofl: No, it doesn't. Five characters are not that relevant when typing, but these five chars might be very relevant when reading. And ease of reading counts much more than ease of typing for source code, as code is much more read than written.
...
What are bitwise shift (bit-shift) operators and how do they work?
...rs can be applied to integer values (int, long, possibly short and byte or char). In some languages, applying the shift operators to any datatype smaller than int automatically resizes the operand to be an int.
Note that <<< is not an operator, because it would be redundant.
Also note that...
How to measure time in milliseconds using ANSI C?
...B_p->tv_sec * 1000000000) + timeB_p->tv_nsec);
}
int main(int argc, char **argv)
{
struct timespec start, end;
clock_gettime(CLOCK_MONOTONIC, &start);
// Some code I am interested in measuring
clock_gettime(CLOCK_MONOTONIC, &end);
uint64_t timeElapsed = timespecDiff(&...
How to pass parameters correctly?
...undamental types or types for which copying is fast, such as int, bool, or char, there is no need to pass by reference if the function simply needs to observe the value, and passing by value should be favored. That is correct if reference semantics is not needed, but what if the function wanted to s...
How are virtual functions and vtable implemented?
...he difference should be neglible. For a class which just contains a single char member, or no members at all, the difference might be notable.
Apart from that, it is important to note that not every call to a virtual function is a virtual function call. If you have an object of a known type, the co...
Is there a way to detect if an image is blurry?
...
If you take a photo of a blank white chart you have no way of telling whether the image is blurry or not. I think the OP wants some absolute sharpness measurement. the preblurred image might not exist at all. You have to work a bit to come with a correct metric,...