大约有 44,000 项符合查询结果（耗时：0.0246秒） [XML]
Concept of void pointer in C programming
...l incorrectly, you can safely dereference a void* in two ways. Casting to char* is always acceptable, and if you know the original type it points to you can cast to that type. The void* has lost the type info so it'd have to be stored elsewhere.
– Dan Olson
M...
LINQ equivalent of foreach for IEnumerable
...d evaluating Funcs
var evaluatedObservable = observable.ToEnumerable().Select(func => func()).ToList();
//Win
Assert.That(evaluatedObservable,
Is.EquivalentTo(values.ToList()));
}
The following fails with the error:
Expected: equivalent to < 0, 1, 2, 3, 4, 5, 6, 7, 8, ...
What's the difference between a file descriptor and file pointer?
...LE Structure returned by fopen
typedef struct
{
unsigned char *_ptr;
int _cnt;
unsigned char *_base;
unsigned char *_bufendp;
short _flag;
short _file;
int __stdioid;
char *__newbase;
#ifdef _THREAD_SAFE
...
Algorithm to return all combinations of k elements from n
... takes an array of letters as an argument and a number of those letters to select.
71 Answers
...
What is the difference between const and readonly in C#?
...Const_V_Readonly
{
public const int I_CONST_VALUE = 2;
public readonly char[] I_RO_VALUE = new Char[]{'a', 'b', 'c'};
public UpdateReadonly()
{
I_RO_VALUE[0] = 'V'; //perfectly legal and will update the value
I_RO_VALUE = new char[]{'V'}; //will cause compiler error
}
}
...
Are there any downsides to passing structs by value in C, rather than passing a pointer?
...e output parameters be listed first before input parameters, e.g. int func(char* out, char *in);
– zooropa
Apr 29 '09 at 12:29
...
Generating all permutations of a given string
... for (int i = 0; i < n; i++)
permutation(prefix + str.charAt(i), str.substring(0, i) + str.substring(i+1, n));
}
}
(via Introduction to Programming in Java)
share
|
improv...
Why is “a” != “a” in C?
...strings at compile time into one to save space.
When you're comparing two character values (which are not pointers), it is a numeric comparison. For example:
'a' == 'a' // always true
share
|
imp...
Difference: std::runtime_error vs std::exception()
... not standard. The runtime_error class has a constructor taking arguments (char*) on both platforms, Windows and Linux. To be portable, better use runtime_error.
(And remember, just because a specification of your project says your code does not have to run on Linux, it does not mean it does never ...
c语言字符串常量内容是否可以通过指针修改 - C/C++ - 清泛网 - 专注C/C++及内核技术
...是：不行。尝试修改的话，运行时程序会崩溃。int main(){ char str1[40]="hello world!"; char *str1="hello world!"...答案是：不行。尝试修改的话，运行时程序会崩溃。
int main()
{
char str1[40]="hello world!"; //char *str1="hello world!";
str1[4]...