zoukankan      html  css  js  c++  java
  • WCHAR and wchar_t 的区别 (zz)

    //z 2012-6-28 16:31:32 PM is2120@csdn
    在定义了unicode的情况下,wsprintf的格式字符串
    c A single character. This sequence is interpreted as type WCHAR.
    C A single character. This sequence is interpreted as type CHAR.

    Q:I was wondering if there was any practical difference between WCHAR and wchar_t.

    A:
    Well, one practical difference would be that WCHAR doesn't exist on my platform. For Windows only (and with no intention of ever porting the program to another platform) and with the necessary headers included, it's the same (sinceWCHAR is just a typedef).

    wchar_t is a distinct type, defined by the C++ standard.

    WCHAR is nonstandard, and as far as I know, exists only on Windows. However, it is simply a typedef (or possibly a macro) for wchar_t, so it makes no practical difference.

    Older versions of MSVC did not have wchar_t as a first-class type, instead of was simply a typedef forshort

    Most likely, they introduced WCHAR to represent "wide character type" across any compiler version, whether or not wchar_t exists as a native type.

    You should use wchar_t in your code though. That's what it's for.


    //z 2012-6-28 16:31:32 PM is2120@csdn

    //z 2012-12-03 10:36:01 IS2120@BG57IV3.T3905646052.K[T42,L399,R15,V371]
    _T _TEXT L 有什么区别

    _T("Text") is a narrow-character (ASCII) literal in an ANSI build but a wide character (UNICODE) literal in a Unicode build.

     L"Text" is always a wide-character literal, regardless of preprocessor definitions.

     _T() is a macro, the L prefix is part of the core C and C++ language lexical structure.



  • 相关阅读:
    常用正则总结
    JavaScript中with语句的理解
    设置点击文本框或图片弹出日历控件
    设置时间 new Date
    windows 下配置 nginx的问题
    CSS3滚动条-webkit-scrollbar
    /、./、../ 的区别
    js中如何获取纯正的undefined?
    关于渐进增强和优雅降级
    每日一练-第三期
  • 原文地址:https://www.cnblogs.com/IS2120/p/6745882.html
Copyright © 2011-2022 走看看