大约有 30,000 项符合查询结果（耗时：0.0288秒） [XML]
How to concatenate twice with the C preprocessor and expand a macro as in “arg ## _ ## MACRO”?
...quires it to work; you tend to find you need the equivalent trick with the stringizing operator too.
Section 6.10.3 of the C99 standard covers 'macro replacement', and 6.10.3.1 covers 'argument substitution'.
After the arguments for the invocation of a function-like macro have been identified,
...
Why does struct alignment depend on whether a field type is primitive or user-defined?
...d750e0 000000e9 11111111 00000000 22222222 00000000
0xe90ed750e0 is the string pointer on my machine (not yours). You can easily see the Int32Wrappers, with the extra 4 bytes of padding that turned the size into 24 bytes. Go back to the struct and put the string last. Repeat and you'll see the...
How can I get a java.io.InputStream from a java.lang.String?
I have a String that I want to use as an InputStream . In Java 1.0, you could use java.io.StringBufferInputStream , but that has been @Deprecrated (with good reason--you cannot specify the character set encoding):
...
Passing variable arguments to another function that accepts a variable argument list
...s is for general debugprinting only so I did this:
//Helper function
std::string osprintf(const char *fmt, ...)
{
va_list args;
char buf[1000];
va_start(args, fmt);
vsnprintf(buf, sizeof(buf), fmt, args );
va_end(args);
return buf;
}
which I then can use like this
Point2d...
Single controller with multiple GET methods in ASP.NET Web API
...ontroller below:
public class TestController : ApiController
{
public string Get()
{
return string.Empty;
}
public string Get(int id)
{
return string.Empty;
}
public string GetAll()
{
return string.Empty;
}
public void Post([FromBod...
Is “argv[0] = name-of-executable” an accepted standard or just a common convention?
...1 states (my emphasis):
If the value of argc is greater than zero, the string pointed to by argv[0] represents the program name; argv[0][0] shall be the null character if the program name is not available from the host environment.
So no, it's only the program name if that name is available. A...
How to convert comma-delimited string to list in Python?
Given a string that is a sequence of several values separated by a commma:
7 Answers
7...
Ruby: Can I write multi-line string with no concatenation?
...tual answers had it, I'm compiling them here:
str = 'this is a multi-line string'\
' using implicit concatenation'\
' to prevent spare \n\'s'
=> "this is a multi-line string using implicit concatenation to eliminate spare
\\n's"
As a bonus, here's a version using funny HEREDOC syntax (via...
SET NAMES utf8 in MySQL?
...fault talks latin1
your hole app is in utf8
connection is made without any extra (so: latin1) (no SET NAMES utf8 ..., no set_charset() method/function)
Store and read data is no problem as long mysql can handle the characters.
if you look in the db you will already see there is crap in it (e.g.us...
C语言结构体里的成员数组和指针 - c++1y / stl - 清泛IT社区，为创新赋能！
...下，改成可以运行的了）：#include <stdlib.h>
#include <string.h>
struct line {
int length;
char contents[0]; // C99的玩法是：char contents[]; 没有指定数组长度
};
int main(){
int this_length=10;
struct line ...