去除输入字符串输入的空字符串

void Trim(string& inout_s)
{
	// Remove leading and trailing whitespace  
	static const char whitespace[] = " \n\t\v\r\f";
	inout_s.erase(0, inout_s.find_first_not_of(whitespace));
	inout_s.erase(inout_s.find_last_not_of(whitespace) + 1U);
}

inout_s.erase(0, inout_s.find_first_not_of(whitespace));将字符串前面的空白区域去掉

inout_s.erase(inout_s.find_last_not_of(whitespace) + 1U);将字符串后面的空白区域去掉