Fixed check is digit

ex00/BitcoinExchange/BitcoinExchange.cpp

@@ -153,6 +153,14 @@ bool    BitcoinExchange::validateDate(const std::string &date)
 	if (date.length() != 10 || date[4] != '-' || date[7] != '-')
 		return (false);
 
+	for (int i = 0; i < 10; i++)
+	{
+		if (i == 4 || i == 7)
+			continue;
+		if (!isdigit(date[i]))
+			return (false);
+	}
+	
 	year  = std::atoi(date.substr(0, 4).c_str());
 	month = std::atoi(date.substr(5, 2).c_str());
 	day   = std::atoi(date.substr(8, 2).c_str());

ex00/input.txt

@@ -1,5 +1,5 @@
 date | value
-2011-01-03 | 3
+2011-01-a3 | 3
 2011-01-03 | 2
 2011-01-03 | 1
 2011-01-03 | 1.2