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Added function to get factorial of number

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Mattrixwv
2021-06-01 15:40:41 -04:00
parent 211c320a88
commit fa296f4440
2 changed files with 56 additions and 4 deletions
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26
CSClasses/Algorithms.cs
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@@ -1,10 +1,10 @@
//C#/CSClasses/Algorithms.cs
//Matthew Ellison
// Created: 08-23-20
//Modified: 08-23-20
//Modified: 06-01-21
//This file contains a class that is used to time the execution time of other programs
/*
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
@@ -775,5 +775,27 @@ namespace mee{
public static long FindNumOccurrence(string str, char c){
return str.Count(ch => ch == c);
}
//Return the factorial of the number passed in
public static int Factorial(int num){
int fact = 1;
for(int cnt = 1;cnt <= num;++cnt){
fact *= cnt;
}
return fact;
}
public static long Factorial(long num){
long fact = 1;
for(long cnt = 1;cnt <= num;++cnt){
fact *= cnt;
}
return fact;
}
public static BigInteger Factorial(BigInteger num){
BigInteger fact = 1;
for(BigInteger cnt = 1;cnt <= num;++cnt){
fact *= cnt;
}
return fact;
}
}
}

34
TestCSClasses/TestAlgorithms.cs
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@@ -1,10 +1,10 @@
//C#/CSClasses/TestCSClasses/TestAlgorithms.cs
//Matthew Ellison
// Created: 03-11-21
//Modified: 03-11-21
//Modified: 06-01-21
//This file contains the tests for the Algorithms class
/*
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
@@ -300,5 +300,35 @@ namespace TestCSClasses{
answer = mee.Algorithms.FindNumOccurrence(testString, testChar);
Assert.AreEqual(correctAnswer, answer, "FindNumOccurrence 3 failed");
}
[TestMethod]
public void TestFactorial(){
//Test 1
int num = 1;
int correctAnswer = 1;
int answer = mee.Algorithms.Factorial(num);
Assert.AreEqual(correctAnswer, answer, "Factorial 1 failed");
//Test 2
num = 10;
correctAnswer = 3628800;
answer = mee.Algorithms.Factorial(num);
Assert.AreEqual(correctAnswer, answer, "Factorial 2 failed");
//Test 3
num = -5;
correctAnswer = 1;
answer = mee.Algorithms.Factorial(num);
Assert.AreEqual(correctAnswer, answer, "Factorial 3 failed");
//Test 4
long numLong = 10;
long correctAnswerLong = 3628800;
long answerLong = mee.Algorithms.Factorial(numLong);
Assert.AreEqual(correctAnswerLong, answerLong, "Factorial 4 failed");
//Test 5
BigInteger numBig = 10;
BigInteger correctAnswerBig = 3628800;
BigInteger answerBig = mee.Algorithms.Factorial(numBig);
Assert.AreEqual(correctAnswerBig, answerBig, "Factorial 5 failed");
}
}
}