Updated to work with the new libraries

headers/Problems/Problem20.hpp

@@ -1,14 +1,14 @@
 //ProjectEuler/ProjectEulerCPP/headers/Problems/Problem20.hpp
 //Matthew Ellison
 // Created: 11-07-18
-//Modified: 08-28-20
+//Modified: 07-02-21
 //What is the sum of the digits of 100!?
 //Unless otherwise listed all non-standard includes are my own creation and available from https://bibucket.org/Mattrixwv/myClasses
 //This file contains a header from the gmp library. The library is used for large integers.
 //You can find more information about them at https://gmplib.org/
 //When compiling this file you need to have the gmp library installed as well as linking the libraries to your executable using the -lgmpxx and -lgmp flags
 /*
-	Copyright (C) 2020  Matthew Ellison
+	Copyright (C) 2021  Matthew Ellison
 
 	This program is free software: you can redistribute it and/or modify
 	it under the terms of the GNU Lesser General Public License as published by
@@ -23,7 +23,6 @@
 	You should have received a copy of the GNU Lesser General Public License
 	along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
-
 #ifndef PROBLEM20_HPP
 #define PROBLEM20_HPP
 
@@ -47,16 +46,18 @@ public:
 	virtual void solve();	//Solve the problem
 	virtual void reset();	//Reset the problem so it can be run again
 	//Gets
-	virtual std::string getResult();	//Return a string with the solution to the problem
+	virtual std::string getResult() const;	//Return a string with the solution to the problem
 	mpz_class getNumber() const;	//Returns the number 100!
 	std::string getNumberString() const;	//Returns the number 100! in a string
 	uint64_t getSum() const;	//Returns the sum of the digits of 100!
 };
 
+
 /* Results:
 100! = 93326215443944152681699238856266700490715968264381621468592963895217599993229915608941463976156518286253697920827223758251185210916864000000000000000000000000
 The sum of the digits is: 648
 It took an average of 4.094 microseconds to run this problem over 100 iterations
 */
 
-#endif //PROBLEM20_HPP
+
+#endif	//PROBLEM20_HPP