초기 커밋.

2025-03-05 10:21:10 +09:00
parent 3471914e64
commit 15885a2286
55 changed files with 1716 additions and 0 deletions
@@ -0,0 +1,65 @@
+internal class Program
+{
+    private void Calculate(int a)
+    {
+        a *= 2;
+    }
+    static double GetData(ref int a, ref double b)
+    { return ++a * ++b; }
+
+    // out 정의
+    static bool GetData(int a, int b, out int c, out int d)
+    {
+        c = a + b;
+        d = a - b;
+        return true;
+    }
+
+    int Calc(int a, int b, string calcType = "+")
+    {
+        switch (calcType)
+        {
+            case "+":
+                return a + b;
+            case "-":
+                return a - b;
+            case "*":
+                return a * b;
+            case "/":
+                return a / b;
+            default:
+                throw new ArithmeticException();
+        }
+    }
+
+    double Calc(params double[] doubles)
+    {
+        return doubles.Sum();
+    }
+
+    private static void Main(string[] args)
+    {
+        Program p = new Program();
+
+        int val = 100;
+        p.Calculate(val);
+        // val는 그대로 100
+        Console.WriteLine($"val = {val} ");
+
+        // ref 사용. 초기화 필요.
+        int x = 1;
+        double y = 1.0;
+        double ret = GetData(ref x, ref y);
+        Console.WriteLine($"x = {x}, y = {y} ");
+
+        // out 사용. 초기화 불필요.
+        int c, d;
+        bool bret = GetData(10, 20, out c, out d);
+        Console.WriteLine($"c = {c}, d = {d} ");
+
+        p.Calc(1, 2);
+        p.Calc(4, 3, "-");
+        p.Calc(1.1, 2.2, 3.3, 4.4);
+
+    }
+}