Added NumberToWords.java ronijpandey#2

Author: sengarsameer

NumberToWords.java

@@ -0,0 +1,47 @@
+/*Given a number, you have to write it in words*/
+import java.io.*;
+import java.util.*;
+class NumberToWords
+{
+    public static void main(String[] args)throws IOException
+    {
+       DataInputStream in=new DataInputStream(System.in);
+        int t,l,x,y;String s,ans;
+String l19[]={"","One ","Two ","Three ","Four ","Five ","Six ","Seven ","Eight ","Nine ","Ten ","Eleven ","Twelve ","Thirteen ","Fourteen ","Fifteen ","Sixteen ","Seventeen ","Eighteen ","Nineteen "};
+        String l90[]={"","","Twenty ","Thirty ","Forty ","Fifty ","Sixty ","Seventy ","Eighty ","Ninety "};
+        //System.out.println("Enter input:");
+        t=Integer.parseInt(in.readLine());
+        while(t>0)
+            {ans="";int c=12;
+            s=in.readLine();l=s.length();int n[]=new int[13];
+             for(int i=l-1;i>=0;i--,c--)
+                 {
+                 n[c]=s.charAt(i)-48;
+             }y=0;
+             for(int i=++c;i<13;i++)
+                 {
+                     switch(i)
+                     {
+                         case 0:if(n[i]==0)break;ans=ans+l19[n[i]]+"Trillion ";break;
+                         case 1:
+                         case 7:
+                         case 4:
+                         case 10:if(n[i]==0)break;ans=ans+l19[n[i]]+"Hundred ";y=n[i];break;
+                         case 2:
+                         case 5:
+                         case 8:
+                         case 11:x=n[i]*10+n[i+1];y=y*100+x;if(y==0)break;if(x<20)ans=ans+l19[x];else ans=ans+l90[n[i]]+l19[n[i+1]];i++;break;
+                         case 3:
+                         case 6:
+                         case 9:
+                         case 12:y=n[i];if(y==0)break;ans=ans+l19[y];break;
+                     }
+                 if(i-1==2&&y!=0){ans=ans+"Billion ";y=0;}
+                 if(i-1==5&&y!=0){ans=ans+"Million ";y=0;}
+                 if(i-1==8&&y!=0){ans=ans+"Thousand ";y=0;}
+                 }
+             System.out.println(ans.trim());
+            t--;
+        }
+    }
+}