Case insensitive standard string comparison in C++ -

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this question has answer here:

void main() {     std::string str1 = "abracadabra";     std::string str2 = "abracadabra";      if (!str1.compare(str2)) {         cout << "compares"     } }

how can make work? bascially make above case insensitive. related question googled , here

http://msdn.microsoft.com/en-us/library/zkcaxw5y.aspx

there case insensitive method string::compare(str1, str2, bool). question how related way doing.

you can create predicate function , use in std::equals perform comparison:

bool icompare_pred(unsigned char a, unsigned char b) {     return std::tolower(a) == std::tolower(b); }  bool icompare(std::string const& a, std::string const& b) {     if (a.length()==b.length()) {         return std::equal(b.begin(), b.end(),                            a.begin(), icompare_pred);     }     else {         return false;     } }

now can do:

if (icompare(str1, str)) {     std::cout << "compares" << std::endl; }

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