C# 練習題 (4)
練習題 (4)：Reynolds number is calculated using formula (D*v*rho)/mu Where D = Diameter, V= velocity, rho = density mu = viscosity Write a program that will accept all values in appropriate units (Don't worry about unit conversion) If number is < 2100, display Laminar flow, If it's between 2100 and 4000 display 'Transient flow' and if more than '4000', display 'Turbulent Flow' (If, else, then...)
很單純的題目，練習從鍵盤讀取使用者輸入的數值，並計算結果。然後，判斷計算完的結果，利用 if、else 將不同的結果輸出。
程式碼：
1: using System;
2:
3: namespace ReynoldsNumber
4: {
5: public class Program
6: {
7: public static void readValue(string name, out double od)
8: {
9: string s;
10: Console.Write("Please input {0}: ", name);
11: s = Console.ReadLine();
12:
13: while (double.TryParse(s, out od) == false)
14: {
15: Console.Write("Please input {0}: ", name);
16: s = Console.ReadLine();
17: }
18: }
19:
20: public static void Main(string[] args)
21: {
22: double d = 0.0, v = 0.0, rho = 0.0, mu = 0.0, reynolds = 0.0;
23: readValue("diameter", out d);
24: readValue("velocity", out v);
25: readValue("density", out rho);
26: readValue("viscosity ", out mu);
27: reynolds = (d * v * rho) / mu;
28:
29: if (reynolds < 2100)
30: {
31: Console.WriteLine("Laminar flow");
32: }
33: else if ((reynolds >= 2100) && (reynolds < 4000))
34: {
35: Console.WriteLine("Transient flow");
36: }
37: else
38: {
39: Console.WriteLine("Turbulent Flow");
40: }
41: }
42: }
43: }
