/* @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 subtracion functionality * @brief testing if length is max 9 significant digits */ public void TestSubtraction() { // no mathematical rules for subtraction MathComponents NewMath = new MathComponents(); // tests to check subtracion functionality decimal?result = NewMath.Subtract(1, 1); Assert.AreEqual(0, result); result = NewMath.Subtract(0, 0); Assert.AreEqual(0, result); result = NewMath.Subtract(1, 1); Assert.AreEqual(0, result); result = NewMath.Subtract(12, -12); Assert.AreEqual(24, result); result = NewMath.Subtract(5, 0.55m); Assert.AreEqual(4.45m, result); result = NewMath.Subtract(-3.00m, -3.00m); Assert.AreEqual(0, result); result = NewMath.Subtract(5.47m, 2.47m); Assert.AreEqual(3, result); result = NewMath.Subtract(-3.25478m, -0.25478m); Assert.AreEqual(-3, result); // test length of returning value (max 9 significant digits) result = NewMath.Subtract(0.58647m, 5.78952411m); Assert.AreEqual(RoundOff(-5.20305411m), result); result = NewMath.Subtract(1115475465, 1115475465); Assert.AreEqual(RoundOff(0), result); result = NewMath.Subtract(5687412.85m, 85456297); Assert.AreEqual(RoundOff(-79768884.15m), result); result = NewMath.Subtract(9652145.2m, -9912.4567m); Assert.AreEqual(RoundOff(9662057.6567m), result); result = NewMath.Subtract(0.99999999m, -0.99999999m); Assert.AreEqual(RoundOff(1.99999998m), result); // test error handling result = NewMath.Subtract(999287952, -999514265); Assert.AreEqual(null, result); result = NewMath.Subtract(900000000, -900000000); Assert.AreEqual(null, result); }