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内存调试技巧：C 语言最大难点揭秘 - C/C++ - 清泛网 - 专注C/C++及内核技术
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清单 1. 简单的潜在堆内存丢失和缓冲区覆盖
void f1(char *explanation)
{
char p1;
p1 = malloc(100);
(void) sprintf(p1,
"The f1 error occurred because of '%s'.",
explanation);
loca...
SQL - The conversion of a varchar data type to a datetime data type resulted in an out-of-range valu
...table). In comment you said you want it in yyyy-mm-dd format. So, try this SELECT CONVERT(char(10), GetDate(),126). Just replace GETDATE() with necessary value.
– Mahe
Dec 30 '13 at 15:29
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When do we have to use copy constructors?
...at is not sufficient. For example:
class Class {
public:
Class( const char* str );
~Class();
private:
char* stored;
};
Class::Class( const char* str )
{
stored = new char[srtlen( str ) + 1 ];
strcpy( stored, str );
}
Class::~Class()
{
delete[] stored;
}
in this case memb...
How does HTTP file upload work?
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Let's take a look at what happens when you select a file and submit your form (I've truncated the headers for brevity):
POST /upload?upload_progress_id=12344 HTTP/1.1
Host: localhost:3000
Content-Length: 1325
Origin: http://localhost:3000
... other headers ...
Conten...
Why does the C preprocessor interpret the word “linux” as the constant “1”?
...LT_MIN__ 1.17549435082228750797e-38F
#define __UINT_LEAST8_TYPE__ unsigned char
#define __INTMAX_C(c) c ## L
#define __CHAR_BIT__ 8
#define __UINT8_MAX__ 255
#define __WINT_MAX__ 2147483647
#define __ORDER_LITTLE_ENDIAN__ 1234
#define __SIZE_MAX__ 18446744073709551615UL
#define __WCHAR_MAX__ 2147483...
How to parse a string to an int in C++?
What's the C++ way of parsing a string (given as char *) into an int? Robust and clear error handling is a plus (instead of returning zero ).
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In C# what is the difference between ToUpper() and ToUpperInvariant()?
...d to hear that there are various other capitalization issues around elided characters etc. This is just one example I know off the top of my head... partly because it bit me years ago in Java, where I was upper-casing a string and comparing it with "MAIL". That didn't work so well in Turkey...
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Converting string to title case
I have a string which contains words in a mixture of upper and lower case characters.
23 Answers
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How to Store Historical Data
...erform an insert statement into FOO_Hist similar to: insert into FOO_HIST select * from FOO where id = @id .
13 Answers
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How do I get the path of a process in Unix / Linux
...swers were specific to linux.
If you need also unix, then you need this:
char * getExecPath (char * path,size_t dest_len, char * argv0)
{
char * baseName = NULL;
char * systemPath = NULL;
char * candidateDir = NULL;
/* the easiest case: we are in linux */
size_t buff_len;
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