/* @brief Loads numbers from input, accumulates their sum, sum of their squares and their count; calculated standard deviation and prints it */ private static int Main(string[] args) { MathComponents math = new MathComponents(); bool conversionSuccessful; string input; decimal square = 0; decimal linearAccumulator = 0; decimal quadraticAccumulator = 0; int count = 0; while (!string.IsNullOrEmpty(input = Console.ReadLine())) { conversionSuccessful = Decimal.TryParse(input, out decimal currentNumber); if (!conversionSuccessful) { Console.WriteLine("Conversion error"); return(-1); } count++; linearAccumulator = CheckNull(math.Add(linearAccumulator, currentNumber)); square = CheckNull(math.Exponentiate(currentNumber, 2)); quadraticAccumulator = CheckNull(math.Add(quadraticAccumulator, square)); } if (count < 2) { Console.WriteLine("Minimum of 2 numbers required"); return(-1); } decimal average = CheckNull(math.Divide(1, count)); average = CheckNull(math.Multiply(average, linearAccumulator)); decimal deviationLeft = CheckNull(math.Subtract(count, 1)); deviationLeft = CheckNull(math.Divide(1, deviationLeft)); decimal deviationRight = CheckNull(math.Exponentiate(average, 2)); deviationRight = CheckNull(math.Multiply(count, deviationRight)); deviationRight = CheckNull(math.Subtract(quadraticAccumulator, deviationRight)); decimal deviation = CheckNull(math.Multiply(deviationLeft, deviationRight)); deviation = CheckNull(math.Root(2, deviation)); /* DEBUG INFO * Console.WriteLine("N: " + count); * Console.WriteLine("sum x: " + linearAccumulator); * Console.WriteLine("sum x^2: " + quadraticAccumulator); * Console.WriteLine("average x: " + average); * // END INFO */ Console.WriteLine(deviation); //Console.ReadLine(); return(0); }
/** * @brief Tests to check exponential functionality * @brief 0^0 is undefined * @brief testing if length is max 9 significant digits */ public void TestExponentiation() { // rules: 0^0 is undefined MathComponents NewMath = new MathComponents(); // tests to check exponential functionality decimal?result = NewMath.Exponentiate(1, 1); Assert.AreEqual(1, result); result = NewMath.Exponentiate(2, 5); Assert.AreEqual(32, result); result = NewMath.Exponentiate(4, -2); Assert.AreEqual(0.0625m, result); result = NewMath.Exponentiate(-5, 3); Assert.AreEqual(-125, result); result = NewMath.Exponentiate(-8, -4); Assert.AreEqual(0.00024414m, result); result = NewMath.Exponentiate(2.00m, 2.00m); Assert.AreEqual(4, result); result = NewMath.Exponentiate((decimal)Math.E, 0); Assert.AreEqual(1, result); result = NewMath.Exponentiate(123456.151m, 0); Assert.AreEqual(1, result); result = NewMath.Exponentiate(0.5m, 5); Assert.AreEqual(0.03125m, result); result = NewMath.Exponentiate(0.5m, -10); Assert.AreEqual(1024, result); result = NewMath.Exponentiate(12, 8); Assert.AreEqual(429981696, result); // test undefined option result = NewMath.Exponentiate(0, 0); Assert.AreEqual(null, result); // test length of returning value (max 9 significant digits) result = NewMath.Exponentiate(2, 0.3m); Assert.AreEqual(RoundOff(1.23114441334491628449m), result); result = NewMath.Exponentiate(0.5m, 10); Assert.AreEqual(RoundOff(0.00097656m), result); // test error handling result = NewMath.Exponentiate(15, 12); Assert.AreEqual(null, result); result = NewMath.Exponentiate(8, 12); Assert.AreEqual(null, result); }