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Questions tagged [cstring]

Refers to 0-terminated strings as popularized by C, as well as the header-files `string.h` and `cstring`.

A C string is a sequence of non-zero bytes terminated by a NUL byte (0x00), usually used to store ASCII or UTF-8 text.

C strings are defined as char arrays in C and C++, where char is an 8-bit type. C strings can be referred to using a char pointer.

Extensions to the basic C string (e.g. to 16-bit wchar_t "wide strings") also exist in various programming environments.

In C++, the standard std::string class interoperates with C strings via the .c_str() method, though beware that std::strings can contain embedded 0-bytes.

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MFC C++ How do I display a const char value in MessageBox?

I hope that the title was good enough to help explain what is needed. After solving this much of my project should be done. When I did this char e[1000] = "HELLO"; CString msg; msg.Format(_T("%s"), e); MessageBox(msg); the…
Ashton
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Shall we treat BSTR type in COM as value or reference?

From book ATL Internals, I knew BSTR is different from OLECHAR*, and there are CComBSTR and CString for BSTR. According MSDN Allocating and Releasing Memory for a BSTR, I knew memory management responsibility for caller/callee. Take this line from…
Raymond
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Unexpected behaviour of memset()

I am initializing array with 99 in all the elememts #include #include int main(){ int a[10]; memset(a,99,10); std::cout<
dead programmer
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URL escaping MFC strings

How do you URL escape an MFC CString?
Raul Agrait
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Which is better code for converting BSTR parameters to ANSI in C/C++?

So far I've discovered I can convert incoming BSTRs to ANSI in two (of many?) ways, and I'm curious to know whether one is "better" than the other with respect to speed / efficiency etc. The way I've been using for a while is use the USES_CONVERSION…
bugmagnet
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C++/CLI Printing contents of CString to console

C++ newbie here with a quick question. How do I print the contents of CString to the Console? Doing this int main(array ^args) { CString cs1 = _T("Hy"); CString cs2 = _T(" u"); CString cs3 = cs1 + cs2; …
Klaus Nji
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Conversion of UTF-8 char * to CString

How do I convert a string in UTF-8 char* to CString?
Greenhorn
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NULL terminated string and its length

I have a legacy code that receives some proprietary, parses it and creates a bunch of static char arrays (embedded in class representing the message), to represent NULL strings. Afterwards pointers to the string are passed all around and finally…
dimba
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C++ Delete array of c-strings/other type of array

[EDIT] Okay, so that makes sense, thank you sharptooth and CashCow. You can't delete data allocated as const, which makes string literals out of the question. So if I change my initialization to look like this: char **groups = new char*[2]; char…
michael.bartnett
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Is std::string a better idea than char* when you're going to have to pass it as a char*?

In a recent question, I learned that there are situations where you just gotta pass a char* instead of a std::string. I really like string, and for situations where I just need to pass an immutable string, it works fine to use .c_str(). The way I…
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char* as an argument to a function in C

When passing a char* as an argument to a function, should the called function do a free on that string? Otherwise the data would be "lost" right and the program would leak data. Or are char* handled in a special way by the compiler to avoid everyone…
inquam
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Trying to pass a CStringArray gives error cannot access private member declared in class 'CObject'

I'm getting a strange error telling me that I cannot access private member declared in class 'CObject' when simply trying to pass a CStringArray to a function I have written to break it up into pieces. I've commented out my entire function code so I…
JayB
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getting the length of an array using strlen in g++ compiler

could someone explain why i am getting this error when i am compiling the source using following g++ compiler #include #include using namespace std; int main() { char source_language[50]; …
KItis
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CString += operator performance issues

I am working on an older MFC/C++ project that parses large text files using MFC's CString class to handle strings. I noticed that during the parsing process there's a lot of adding of small parts to an overall large CString object as…
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C++: how to convert ASCII or ANSI to UTF8 and stores in std::string

My company use some code like this: std::string(CT2CA(some_CString)).c_str() which I believe it converts a Unicode string (whose type is CString)into ANSI encoding, and this string is for a email's subject. However, header of the email (which…
Joe
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