Ex4 - Q3

src/main/java/formula/AbsoluteValue.java

+package formula;
+
+public class AbsoluteValue implements Formula {
+    private Formula formula;
+
+    public AbsoluteValue(Formula formula) {
+        this.formula = formula;
+    }
+
+    @Override
+    public String asString() {
+        return "|" + formula.asString() + "|";
+    }
+
+    @Override
+    public double asValue() {
+        return Math.abs(formula.asValue());
+    }
+}
+

src/main/java/formula/Maximum.java

+package formula;
+
+public class Maximum implements Formula {
+    private Formula[] formulas;
+
+    public Maximum(Formula... formulas) {
+        this.formulas = formulas;
+    }
+
+    @Override
+    public String asString() {
+        StringBuilder sb = new StringBuilder("max(");
+        for (int i = 0; i < formulas.length; i++) {
+            sb.append(formulas[i].asString());
+            if (i < formulas.length - 1) sb.append(", ");
+        }
+        sb.append(")");
+        return sb.toString();
+    }
+
+    @Override
+    public double asValue() {
+        double max = -Double.MAX_VALUE;
+        for (Formula formula : formulas) {
+            max = Math.max(max, formula.asValue());
+        }
+        return max;
+    }
+}

src/main/java/formula/Minimum.java

+package formula;
+
+public class Minimum implements Formula {
+    private Formula[] formulas;
+
+    public Minimum(Formula... formulas) {
+        this.formulas = formulas;
+    }
+
+    @Override
+    public String asString() {
+        StringBuilder sb = new StringBuilder("min(");
+        for (int i = 0; i < formulas.length; i++) {
+            sb.append(formulas[i].asString());
+            if (i < formulas.length - 1) sb.append(", ");
+        }
+        sb.append(")");
+        return sb.toString();
+    }
+
+    @Override
+    public double asValue() {
+        double min = Double.MAX_VALUE;
+        for (Formula formula : formulas) {
+            min = Math.min(min, formula.asValue());
+        }
+        return min;
+    }
+}

src/main/java/formula/Power.java

+package formula;
+
+public class Power implements Formula {
+    private Formula formula;
+    private int exponent;
+
+    public Power(Formula formula, int exponent) {
+        this.formula = formula;
+        this.exponent = exponent;
+    }
+
+    @Override
+    public String asString() {
+        return "(" + formula.asString() + ")^" + exponent;
+    }
+
+    @Override
+    public double asValue() {
+        return Math.pow(formula.asValue(), exponent);
+    }
+}

src/main/java/formula/Square.java

@@ -9,12 +9,11 @@ public class Square implements Formula {
 
     @Override
     public String asString() {
-        return "(" + formula.asString() + "^2)";
+        return "(" + formula.asString() + ")²";
     }
 
     @Override
     public double asValue() {
         return Math.pow(formula.asValue(), 2);
     }
-
 }

src/main/java/formula/SquareRoot.java

+package formula;
+
+public class SquareRoot implements Formula {
+    private Formula formula;
+
+    public SquareRoot(Formula formula) {
+        this.formula = formula;
+    }
+
+    @Override
+    public String asString() {
+        return "√(" + formula.asString() + ")";
+    }
+
+    @Override
+    public double asValue() {
+        return Math.sqrt(formula.asValue());
+    }
+}