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My attempt at value initialization is interpreted as a function declaration, and why doesn't A a(())
...st one argument. One of built-in classes which takes two arguments is std::string
std::string hundred_dots(100, '.');
This is all well and fine (technically, it would have most vexing parse if it would be written as std::string wat(int(), char()), but let's be honest - who would write that? But l...
What is the difference between printf() and puts() in C?
...ically appends a newline. If that's not what you want, you can fputs your string to stdout or use printf.
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What does the 'b' character do in front of a string literal?
...xtra character. What would be a case in v3 where you would need to use a b string as opposed to just a regular string?
– Jesse Webb
Jun 7 '11 at 19:05
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When should I use malloc in C and when don't I?
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char *some_memory = "Hello World";
is creating a pointer to a string constant. That means the string "Hello World" will be somewhere in the read-only part of the memory and you just have a pointer to it. You can use the string as read-only. You cannot make changes to it. Example:
some_...
How do I execute a command and get the output of the command within C++ using POSIX?
...stream>
#include <memory>
#include <stdexcept>
#include <string>
#include <array>
std::string exec(const char* cmd) {
std::array<char, 128> buffer;
std::string result;
std::unique_ptr<FILE, decltype(&pclose)> pipe(popen(cmd, "r"), pclose);
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How does HTTP file upload work?
... here ...
------WebKitFormBoundaryePkpFF7tjBAqx29L--
NOTE: each boundary string must be prefixed with an extra --, just like in the end of the last boundary string. The example above already includes this, but it can be easy to miss. See comment by @Andreas below.
Instead of URL encoding the form...
How to construct a std::string from a std::vector?
Short of (the obvious) building a C style string first then using that to create a std::string, is there a quicker/alternative/"better" way to initialize a string from a vector of chars?
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Regex: match everything but specific pattern
I need a regex able to match everything but a string starting with a specific pattern (specifically index.php and what follows, like index.php?id=2342343 )
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How to read a line from the console in C?
...th specified declaring the variable and the length specified in the format string. It is a historical artefact.
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What is the difference between sigaction and signal?
... And that's it. Anything else is not guaranteed to be portable. That's so stringent that most people ignore those rules — but the resulting code is dodgy.
– Jonathan Leffler
Oct 27 '16 at 16:14
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