TCHAR System/char System/wchar system and its mutual transformation in windows/mfc,c++

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Unicode, ANSI strings are often encountered in windows/mfc,c++ programming, and these strings need to be converted, and the system and its transformations are summarized in this paper.

First article: Basic article

3 common functions and analysis of large system See blog: http://blog.csdn.net/u010003835/article/details/47344775

In addition, the next function I write is to write the naming rules for Windows on Char*,tchar*,const tchar*

Unfamiliar children's shoes can refer to the blog: http://blog.csdn.net/u010003835/article/details/47604553

TCHAR Type , select the character set according to the environmental Judgment

Required String Conversion Macros:

_t ()/TEXT () converts a string based on the current environment

The difference between it and L See blog: http://blog.csdn.net/u010003835/article/details/47606621

Examples of representative functions and their proper use:

LPTSTR temp_t = new TCHAR[MAXN];

Temp_t[0] = 0;

_tcscpy (temp_t, _t ("Hi, kemeng~"));

_tprintf (_t ("_tprintf:%s\n"), temp_t);

Delete[] temp_t;

WCHAR Type, using Unicode encoding

Required string Conversion macro: L "XXXX" To encode the current string in Unicode format

Test code:

LPWSTR temp_w = new WCHAR[MAXN];

Temp_w[0] = 0;

wcscpy (Temp_w, L "Hi, kemeng~");

wprintf (L "wprintf:%s\n", temp_w);

Delete[] Temp_w;

Common errors:

The first type:

wprintf ("%s", L "aaaaaa");

Another type of:

wprintf (L "%s", "aaaaaa");

Correct wording:

wprintf (L "%s", L "aaaaaa");

Wcout seems more intelligent, will convert the original string, estimated by overloading, after testing in the supplementary

ASCII encoding,

String conversion macros are not required

Sample code

LPSTR Temp_c = new Char[maxn];temp_c[0] = 0;strcpy (Temp_c, "Hi, kemeng~");p rintf ("printf:%s\n", Temp_c);d elete[] Temp_c;

Chapter II: Advanced article

Wchar,tchar,char conversions between types of strings:

Method One: Use macros such as A2T.

The name of the macro means see the blog post:

http://blog.csdn.net/u010003835/article/details/47609975

If you use these macros you need to include the header file:

#include <atlbase.h>

and to declare

Uses_conversion; //T2A,A2T,W2T,W2A,A2CW and other support, need to make this statement

The Complete test code:

#include <iostream> #include <windows.h> #include <atlbase.h> #include <tchar.h>using namespace std; #define MAXN 255#pragma Warning (disable:4996) int main () {USES_CONVERSION;//T2A,A2T,W2T,W2A,A2CW etc support, This declaration is required//T2A. TCHAR the conversion of a string to a char string. cout << Endl << "TCHAR convertion to char use T2A" << Endl; LPTSTR name1_t = _t ("Hi, kemeng~"); LPSTR Temp1_c = Null;temp1_c = T2A (name1_t), _tprintf (_t ("%s\n"), name1_t);p rintf ("%s\n", Temp1_c), cout << "------ --------------------"<< endl;//a2t. Char string to TCHAR string conversion cout << Endl << "char convertion to TCHAR use a2t" << Endl; LPSTR Name2_c = "Hi, kemeng~"; LPTSTR temp2_t = a2t (name2_c);p rintf ("%s\n", Name2_c), _tprintf (_t ("%s\n"), temp2_t) cout << "------------------ --------"<< endl;//w2t. WCHAR string to TCHAR string conversion cout << Endl << "WCHAR convertion to TCHAR use w2t" << Endl; LPWSTR name3_w = L "Hi, kemeng~"; LPTSTR temp3_t = t2w (name3_w); wprintf (L "%s\n", name3_w); _tprintf(_t ("%s\n"), temp3_t) cout << "--------------------------" << endl;//w2t. WCHAR string to const char string conversion cout << Endl << "WCHAR convertion to const char use W2CA" << Endl; LPWSTR name4_w = L "Hi, kemeng~"; LPCSTR temp4_a = W2CA (Name4_w), wprintf (L "%s\n", Name4_w);p rintf ("%s\n", temp4_a); cout << "--------------------- -----"<< Endl;return 0;}

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TCHAR System/char System/wchar system and its mutual transformation in windows/mfc,c++