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C语言结构体里的成员数组和指针 - C/C++ - 清泛网 - 专注C/C++及内核技术
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#include <stdio.h>
struct str{
int len;
char s[0];
};
struct foo {
struct str *a;
};
int main(int argc, char** argv) {
struct foo f={0};
if (f.a->s) {
printf( f.a->s);
}
return 0;
}
你编...
What is __stdcall?
...ll Scene::ExecuteCommand(void* command)
{
return system(static_cast<char*>(command));
}
Is there a way to specify how many characters of a string to print out using printf()?
Is there a way to specify how many characters of a string to print out (similar to decimal places in int s)?
8 Answers
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What Every Programmer Should Know About Memory?
... if you want efficient loads of just one half of the object, you need ugly union hacks: How can I implement ABA counter with c++11 CAS?. (Don't confuse DWCAS with DCAS of 2 separate memory locations. Lock-free atomic emulation of DCAS isn't possible with DWCAS, but transactional memory (like x86 T...
Questions every good .NET developer should be able to answer? [closed]
... which hooks onto the custom event handler.
(XML) Load an XML document and select all of the nodes with properties x, y, and z.
(Functional programming) Create a function that accepts another function as a parameter. A Map or Fold function works really good for this.
(Reflection) Write a function wh...
how to convert a string to date in mysql?
I have a string column which acts as a date and I want to select it as a date .
5 Answers
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Converting string to byte array in C#
...[] GetBytes(string str)
{
byte[] bytes = new byte[str.Length * sizeof(char)];
System.Buffer.BlockCopy(str.ToCharArray(), 0, bytes, 0, bytes.Length);
return bytes;
}
static string GetString(byte[] bytes)
{
char[] chars = new char[bytes.Length / sizeof(char)];
System.Buffer.B...
Determine the number of lines within a text file
...lt is another problem as you read the whole file just to count the newline character(s),
At some point, someone is going to have to read the characters in the file, regardless if this the framework or if it is your code. This means you have to open the file and read it into memory if the file is la...
How to compute the similarity between two text documents?
...mmer = nltk.stem.porter.PorterStemmer()
remove_punctuation_map = dict((ord(char), None) for char in string.punctuation)
def stem_tokens(tokens):
return [stemmer.stem(item) for item in tokens]
'''remove punctuation, lowercase, stem'''
def normalize(text):
return stem_tokens(nltk.word_tokeni...
What is a simple command line program or script to backup SQL server databases?
...ng to backup all Databases:
Use Master
Declare @ToExecute VarChar(8000)
Select @ToExecute = Coalesce(@ToExecute + 'Backup Database ' + [Name] + ' To Disk = ''D:\Backups\Databases\' + [Name] + '.bak'' With Format;' + char(13),'')
From
Master..Sysdatabases
Where
[Name] Not In ('tempdb')
and d...