tasks a-s

Task/Number-names/Java/number-names-1.java

@@ -0,0 +1,64 @@
+public class Int2Words {
+    static String[] small = {"one", "two", "three", "four", "five", "six",
+        "seven", "eight", "nine", "ten", "eleven", "twelve", "thirteen", "fourteen",
+        "fifteen", "sixteen", "seventeen", "eighteen", "nineteen"};
+    static String[] tens = {"twenty", "thirty", "forty", "fifty", "sixty", "seventy", "eighty",
+        "ninety"};
+    static String[] big = {"thousand", "million", "billion", "trillion"};
+
+    public static void main(String[] args) {
+        System.out.println(int2Text(900000001));
+        System.out.println(int2Text(1234567890));
+        System.out.println(int2Text(-987654321));
+        System.out.println(int2Text(0));
+    }
+
+    public static String int2Text(long number) {
+        long num = 0;
+        String outP = "";
+        int unit = 0;
+        long tmpLng1 = 0;
+
+        if (number == 0) {
+            return "zero";
+        }
+
+        num = Math.abs(number);
+
+        for (;;) {
+            tmpLng1 = num % 100;
+            if (tmpLng1 >= 1 && tmpLng1 <= 19) {
+                outP = small[(int) tmpLng1 - 1] + " " + outP;
+            } else if (tmpLng1 >= 20 && tmpLng1 <= 99) {
+                if (tmpLng1 % 10 == 0) {
+                    outP = tens[(int) (tmpLng1 / 10) - 2] + " " + outP;
+                } else {
+                    outP = tens[(int) (tmpLng1 / 10) - 2] + "-"
+                            + small[(int) (tmpLng1 % 10) - 1] + " " + outP;
+                }
+            }
+
+            tmpLng1 = (num % 1000) / 100;
+            if (tmpLng1 != 0) {
+                outP = small[(int) tmpLng1 - 1] + " hundred " + outP;
+            }
+
+            num /= 1000;
+            if (num == 0) {
+                break;
+            }
+
+            tmpLng1 = num % 1000;
+            if (tmpLng1 != 0) {
+                outP = big[unit] + " " + outP;
+            }
+            unit++;
+        }
+
+        if (number < 0) {
+            outP = "negative " + outP;
+        }
+
+        return outP.trim();
+    }
+}

Task/Number-names/Java/number-names-2.java

@@ -0,0 +1,18 @@
+public class NumberToWordsConverter { // works upto 9999999
+
+	final private  static String[] units = {"Zero","One","Two","Three","Four",
+		"Five","Six","Seven","Eight","Nine","Ten",
+		"Eleven","Twelve","Thirteen","Fourteen","Fifteen",
+		"Sixteen","Seventeen","Eighteen","Nineteen"};
+	final private static String[] tens = {"","","Twenty","Thirty","Forty","Fifty",
+		"Sixty","Seventy","Eighty","Ninety"};
+
+	public static String convert(Integer i) {
+		//
+		if( i < 20)  return units[i];
+		if( i < 100) return tens[i/10] + ((i % 10 > 0)? " " + convert(i % 10):"");
+		if( i < 1000) return units[i/100] + " Hundred" + ((i % 100 > 0)?" and " + convert(i % 100):"");
+		if( i < 1000000) return convert(i / 1000) + " Thousand " + ((i % 1000 > 0)? " " + convert(i % 1000):"") ;
+		return convert(i / 1000000) + " Million " + ((i % 1000000 > 0)? " " + convert(i % 1000000):"") ;
+	}
+}