Tehtud kodutöö (Vladislav Šutov)

Function.java

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+public interface Function{
+	public String f(double x);
+} 

SqrtFunction.java

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+import java.io.*;
+
+public class SqrtFunction implements Function{
+	double Square;
+	public String f(double x){
+		Square = Math.sqrt(x);
+
+		String text = Double.toString(Math.abs(Square));
+		int integerPlaces = text.indexOf('.');
+		int decimalPlaces = text.length() - integerPlaces - 1;
+		int Answer = integerPlaces+decimalPlaces;
+
+
+		if(text.substring(Answer).equals("0")){
+			return "Number "+x+" square root is "+Square;
+		}else if (x<0){
+			return "That aint a suitable number, boi! ("+x+")";
+		}else{
+
+			return "Number "+x+" square root is not a precise number.  ("+Square+")";
+		}
+	}
+
+}

Usage.java

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+import java.util.*;
+public class Usage{
+
+	public static String calculate(Function fn, double number){
+		return fn.f(number);
+	}
+
+
+	public static void main(String[] arg){
+		SqrtFunction sqrtCalculate=new SqrtFunction();
+		System.out.println(calculate(sqrtCalculate, 100));
+		System.out.println(calculate(sqrtCalculate, 200));
+		System.out.println(calculate(sqrtCalculate, 300));
+		System.out.println(calculate(sqrtCalculate, -150));
+		System.out.println(calculate(sqrtCalculate, 11));
+		System.out.println(calculate(sqrtCalculate, 1));
+
+	}
+}