Lab2 part 2

.idea/workspace.xml

@@ -2,13 +2,9 @@
 <project version="4">
   <component name="ChangeListManager">
     <list default="true" id="49638fa3-c946-4bb6-9c97-1a148c116245" name="Changes" comment="">
-      <change afterPath="$PROJECT_DIR$/.gitignore" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/.idea/misc.xml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/Main.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/Main.java" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/.idea/modules.xml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/ObiektoweDwa.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/ObiektoweDwa.java" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/.idea/vcs.xml" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/lab2.iml" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/src/Main.java" afterDir="false" />
     </list>
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />

src/Main.java

@@ -129,5 +129,28 @@ public class Main {
 
         System.out.println("=== Zadanie 5 (palindrom) ===");
         z5();
+
+        System.out.println("======================");
+        System.out.println("=== ZADANIA PART 2 ===");
+        System.out.println("======================");
+
+        System.out.println("=== Zadanie 1 (kwadratówka) ===");
+        ObiektoweDwa.z1();
+
+        System.out.println("=== Zadanie 2 (funkcje) ===");
+        ObiektoweDwa.z2();
+
+        System.out.println("=== Zadanie 3 (sort) ===");
+        ObiektoweDwa.z3();
+
+        System.out.println("=== Zadanie 4 (autobus) ===");
+        ObiektoweDwa.z4();
+
+        System.out.println("=== Zadanie 5 (samochód) ===");
+        ObiektoweDwa.z5();
+
+        System.out.println("=== Zadanie 6 (kalkulator) ===");
+        ObiektoweDwa.z6();
+
     }
 }

src/ObiektoweDwa.java

@@ -0,0 +1,167 @@
+import java.util.Scanner;
+
+public class ObiektoweDwa {
+    public static void z1() {
+        Scanner scanner = new Scanner(System.in);
+
+        double a, b, c;
+
+        System.out.print("Podaj a: ");
+        a = scanner.nextDouble();
+
+        System.out.print("Podaj b: ");
+        b = scanner.nextDouble();
+
+        System.out.print("Podaj c: ");
+        c = scanner.nextDouble();
+
+        if(a == 0) { // liniowe
+            System.out.println("x = " + (-c / b));
+        } else { // kwadratowe
+            double delta = Math.pow(b, 2) - (4 * a * c);
+            if(delta < 0) {
+                System.out.println("Brak rozwiązań");
+            } else if(delta == 0) {
+                System.out.println("x = " + (-b / a));
+            } else {
+                System.out.println("x1 = " + ((-b - Math.sqrt(delta)) / (2 * a)));
+                System.out.println("x2 = " + ((-b + Math.sqrt(delta)) / (2 * a)));
+            }
+        }
+    }
+
+    private static double z2_a(double x) {
+        if(x > 0) return 2 * x;
+        if(x == 0) return 0;
+        return -3 * x;
+    }
+
+    private static double z2_b(double x) {
+        if(x >= 1) return Math.pow(x, 2);
+        return x;
+    }
+
+    private static double z2_c(double x) {
+        if(x > 2) return 2 + x;
+        if(x == 2) return 8;
+        return x - 4;
+    }
+
+    public static void z2() {
+        Scanner scanner = new Scanner(System.in);
+
+        System.out.print("Podaj x: ");
+        double x = scanner.nextDouble();
+
+        System.out.println("a: " + z2_a(x));
+        System.out.println("b: " + z2_b(x));
+        System.out.println("c: " + z2_c(x));
+    }
+
+    public static void z3() {
+        Scanner scanner = new Scanner(System.in);
+
+        int a, b, c;
+
+        System.out.print("Podaj a: ");
+        a = scanner.nextInt();
+
+        System.out.print("Podaj b: ");
+        b = scanner.nextInt();
+
+        System.out.print("Podaj c: ");
+        c = scanner.nextInt();
+
+        if(a >= b && a >= c) {
+            System.out.print(a + ", ");
+            if(b >= c) {
+                System.out.println(b + ", " + c);
+            } else {
+                System.out.println(c + ", " + b);
+            }
+        } else if(b >= a && b >= c) {
+            System.out.print(b + ", ");
+            if(a >= c) {
+                System.out.println(a + ", " + c);
+            } else {
+                System.out.println(c + ", " + a);
+            }
+        } else {
+            System.out.print(c + ", ");
+            if(a >= b) {
+                System.out.println(a + ", " + b);
+            } else {
+                System.out.println(b + ", " + a);
+            }
+        }
+    }
+
+    public static void z4() {
+        Scanner scanner = new Scanner(System.in);
+
+        System.out.print("Czy pada? (y/n)");
+        String pada = scanner.next();
+        boolean czyPada = pada == "y" || pada == "Y";
+
+        System.out.print("Jest autobus? (y/n)");
+        String autobus = scanner.next();
+        boolean jestAutobus = autobus == "y" || autobus == "Y";
+
+        if(czyPada && jestAutobus) System.out.println("Weź parasol, dostaniesz sięna uczelnię");
+        if(czyPada && !jestAutobus) System.out.println("Nie dostaniesz się na uczelnię");
+        if(!czyPada && jestAutobus) System.out.println("Dostaniesz się na uczelnię, miłego dnia i pięknej pogody");
+    }
+
+    public static void z5() {
+        Scanner scanner = new Scanner(System.in);
+
+        System.out.print("Jest zniżka? (y/n)");
+        String znizka = scanner.next();
+        boolean czyZnizka = znizka == "y" || znizka == "Y";
+
+        System.out.print("Podwyżka? (y/n)");
+        String podwyzka = scanner.next();
+        boolean czyPodwyzka = podwyzka == "y" || podwyzka == "Y";
+
+        if(!czyZnizka || czyPodwyzka) System.out.println("Możesz kupić samochód, zniżki na samochód nie ma");
+        if(!czyZnizka && !czyPodwyzka) System.out.println("Zakup samochodu trzeba odłożyć na później, zniżki na samochód nie ma");
+        if(czyZnizka || czyPodwyzka) System.out.println("Możesz kupić samochód");
+    }
+
+    public static void z6() {
+        Scanner scanner = new Scanner(System.in);
+
+        double a, b;
+        String oper;
+
+        System.out.print("Podaj 1 liczbę: ");
+        a = scanner.nextDouble();
+
+        System.out.print("Podaj operację: ");
+        oper = scanner.next();
+
+        System.out.print("Podaj 2 liczbę: ");
+        b = scanner.nextDouble();
+
+        if(oper == "/" && b == 0) System.out.println("/0 nie");
+        else {
+            switch(oper) {
+                case "+":
+                    System.out.println(a + " + " + b + " = " + (a + b));
+                    break;
+                 case "-":
+                    System.out.println(a + " - " + b + " = " + (a - b));
+                    break;
+                 case "*":
+                    System.out.println(a + " * " + b + " = " + (a * b));
+                    break;
+                 case "/":
+                    System.out.println(a + " / " + b + " = " + (a / b));
+                    break;
+                 case "%":
+                    System.out.println(a + " % " + b + " = " + (a % b));
+                    break;
+            }
+        }
+    }
+}