Interview Question
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class constNumtoLetter {
- ashok kumar May 04, 2013String[] unitdo = {"", " One", " Two", " Three", " Four", " Five",
" Six", " Seven", " Eight", " Nine", " Ten", " Eleven", " Twelve",
" Thirteen", " Fourteen", " Fifteen", " Sixteen", " Seventeen",
" Eighteen", " Nineteen"};
String[] tens = {"", "Ten", " Twenty", " Thirty", " Forty", " Fifty",
" Sixty", " Seventy", " Eighty", " Ninety"};
String[] digit = {"", " Hundred", " Thousand", " Lakh", " Crore"};
int r;
//Count the number of digits in the input number
int numberCount(int num) {
int cnt = 0;
while (num > 0) {
r = num % 10;
cnt++;
num = num / 10;
}
return cnt;
}
//Function for Conversion of two digit
String twonum(int numq) {
int numr, nq;
String ltr = "";
nq = numq / 10;
numr = numq % 10;
if (numq > 19) {
ltr = ltr + tens[nq] + unitdo[numr];
} else {
ltr = ltr + unitdo[numq];
}
return ltr;
}
//Function for Conversion of three digit
String threenum(int numq) {
int numr, nq;
String ltr = "";
nq = numq / 100;
numr = numq % 100;
if (numr == 0) {
ltr = ltr + unitdo[nq] + digit[1];
} else {
ltr = ltr + unitdo[nq] + digit[1] + " and" + twonum(numr);
}
return ltr;
}
}
public class NumberToString {
public static String getNumberToString(String numberStr) {
String resultStr = "";
int len, q = 0, r = 0;
String ltr = " ";
// String Str = "";
constNumtoLetter n = new constNumtoLetter();
int num = Integer.parseInt(numberStr);
if (num <= 0) {
System.out.println("Zero or Negative number not for conversion");
}
while (num > 0) {
len = n.numberCount(num);
//Take the length of the number and do letter conversion
switch (len) {
case 8:
q = num / 10000000;
r = num % 10000000;
ltr = n.twonum(q);
resultStr = resultStr + ltr + n.digit[4];
num = r;
break;
case 7:
case 6:
q = num / 100000;
r = num % 100000;
ltr = n.twonum(q);
resultStr = resultStr + ltr + n.digit[3];
num = r;
break;
case 5:
case 4:
q = num / 1000;
r = num % 1000;
ltr = n.twonum(q);
resultStr = resultStr + ltr + n.digit[2];
num = r;
break;
case 3:
if (len == 3) {
r = num;
}
ltr = n.threenum(r);
resultStr = resultStr + ltr;
num = 0;
break;
case 2:
ltr = n.twonum(num);
resultStr = resultStr + ltr;
num = 0;
break;
case 1:
resultStr = resultStr + n.unitdo[num];
num = 0;
break;
default:
num = 0;
System.out.println("Exceeding Crore....No conversion");
System.exit(1);
}
}
return resultStr;
}
public static void main(String[] args) throws Exception {
//Defining variables q is quotient, r is remainder''
System.out.print(getNumberToString(22));
}
}