字符串中的TRIM操作

std::string& ltrim(std::string& str, const std::string& chars = "\t\n\v\f\r");

std::string& rtrim(std::string& str, const std::string& chars = "\t\n\v\f\r");

std::string& trim(std::string& str, const std::string& chars = "\t\n\v\f\r");

std::string& ltrim(std::string& str, const std::string&chars)

{

    str.erase(0, str.find_first_not_of(chars));returnstr;

}

 

std::string& rtrim(std::string& str, const std::string&chars)

{

    str.erase(str.find_last_not_of(chars)+ 1);returnstr;

}

 

std::string& trim(std::string& str, const std::string&chars)

{returnltrim(rtrim(str, chars), chars);

}