大约有 40,000 项符合查询结果（耗时：0.0294秒） [XML]
How to convert a char array to a string?
Converting a C++ string to a char array is pretty straightorward using the c_str function of string and then doing strcpy . However, how to do the opposite?
...
How can I add reflection to a C++ application?
...); \
}\
const char * name() const \
{\
return BOOST_PP_STRINGIZE(STRIP(x)); \
} \
}; \
What this does is generate a constant fields_n that is number of reflectable fields in the class. Then it specializes the field_data for each field. It also friends the reflector class, t...
Password masking console application
...ur else block that removes the previously entered character from your pass string variable.
Here's the relevant working code that should do what you require:
var pass = string.Empty;
ConsoleKey key;
do
{
var keyInfo = Console.ReadKey(intercept: true);
key = keyInfo.Key;
if (key == Conso...
Use of 'const' for function parameters
...
Extra Superfluous const are bad from an API stand-point:
Putting extra superfluous const's in your code for intrinsic type parameters passed by value clutters your API while making no meaningful promise to the caller or API ...
Get an object properties list in Objective-C
... const char *propType = getPropertyType(property);
NSString *propertyName = [NSString stringWithCString:propName
encoding:[NSString defaultCStringEncoding]];
NSString *propertyType = [NSString stringWit...
Are Javascript arrays sparse?
...ly hash tables internally, so you can use not only large integers but also strings, floats, or other objects. All keys get converted to strings via toString() before being added to the hash. You can confirm this with some test code:
<script>
var array = [];
array[0] = "zero";
array[new ...
How does the main() method work in C?
...t lists, is one of those features.
Programmers noticed that they can pass extra arguments to a function, and nothing bad happens with their given compiler.
This is the case if the calling conventions are such that:
The calling function cleans up the arguments.
The leftmost arguments are closer t...
What does int argc, char *argv[] mean?
...e arguments are passed to main() in C and C++.
argc will be the number of strings pointed to by argv. This will (in practice) be 1 plus the number of arguments, as virtually all implementations will prepend the name of the program to the array.
The variables are named argc (argument count) and ar...
How do I tokenize a string in C++?
...e convenient. But what would its return type be? std::vector<std::basic_string<…>>? Maybe, but then we’re forced to perform (potentially redundant and costly) allocations.
Instead, C++ offers a plethora of ways to split strings based on arbitrarily complex delimiters, but none of th...
MIN and MAX in C
...
@Makouda: Extra parentheses in macros help to avoid operator precedence problems. For example, consider #define MULT(x, y) x * y. Then MULT(a + b, a + b) expands to a + b * a + b, which parses as a + (b * a) + b due to precedence. T...