使用transform();全轉化為小寫，然后對比string

#include?<string>
#include?<algorithm>

using?namespace?std;

namespace?BaseFunc
{
????//?string轉小寫
????string?strToLower(const?string?&str)
????{
????????string?strTmp?=?str;
????????transform(strTmp.begin(),strTmp.end(),strTmp.begin(),tolower);
????????return?strTmp;
????}

????//?string.compareNoCase
????bool?compareNoCase(const?string?&strA,const?string?&strB)
????{
????????string?str1?=?strToLower(strA);
????????string?str2?=?strToLower(strB);
????????return?(str1?==?str2);
????}

????//?另一法
????bool?compare(const?string&?x,?const?string&?y)
????{
????????string::const_iterator?p?=?x.begin();
????????string::const_iterator?q?=?y.begin();
????????//?遍歷對比每個字符
????????while?(p?!=?x.end()?&&?q?!=?y.end()?&&?toupper(*p)?==?toupper(*q))
????????{
????????????++p;
????????????++q;
????????}
????????if?(p?==?x.end())?//?如果x到結尾，y也到結尾則相等
????????{
????????????return?(q?==?y.end());
????????}
????????if?(q?==?y.end())?//?如果x未到結尾，y到結尾返回false
????????{
????????????return?false;
????????}
????????//?如果x,y都沒有到結尾，說明有不相同的字符，返回false
????????return?false;
????????//return?(toupper(*p)?<?toupper(*q));
????}
}

void?main()
{
????string?strA?=?"abc";
????string?strB?=?"AdC";
????bool?b?=?BaseFunc::compareNoCase(?strA,?strB?);
????b?=?BaseFunc::compare(?strA,?strB?);
}

string與CString互相轉換：

string str;CString s;s = str.c_str();str = s;url:http://greatverve.cnblogs.com/archive/2012/12/08/string-compareNoCase.html

?

轉載于:https://www.cnblogs.com/greatverve/archive/2012/12/08/string-compareNoCase.html

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