char s1[] = "中文ABC";
wchar_t s2[] = L"中文ABC";
1.sizeof() /*获取字符数组的字节数（包括结束符0）*/
sizeof(s1) = 8;ANSI
sizeof(s2) = 12;UNICODE
2.strlen/wcslen /*采取0作为字符串的结束符，并返回不包括0在内的字符数目*/
strlen(s1) = 7;ANSI
wcslen(s2) = 5;UNNICODE
3.GetLenth() /*返回字符而非字节数目*/
CStringA sa = s1;ANSI
CStringW sw = s2;UNICODE
sa.GetLength() = 7;
sw.GetLength() = 5;
4.size()与GetLength()一样
5.length() /*获取字符数目的最佳方案*/
_bstr_t::length();
_bstr_t bs1 = s1;
_bstr_t bs2 = s2;
bs1.length() = 5;ANSI
bs2.length() = 5;UNICODE
转载于:https://www.cnblogs.com/zzhua/p/5697606.html
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