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Number To Words

aprendiz (21)
Hello guys. I am trying to write a program for number to word conversion. I am facing some problems.
If i enter a two digit number, result is ok. But when i enter a three digit number, last two digits are not converted correctly.
I am unable to understand what i am doing wrong. I'll really appreciate your help.

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#include <iostream>
#include <conio.h>
using namespace std;

int countDigits (int);
void oneToTwenty (int);
void lastTwo (int);

int main()
{
	int number;
	int digits;
	cout<<"Enter number [1-1000]: ";
	cin>>number;
	digits = countDigits(number);
	cout<<"Digits: "<<digits<<endl;
	if (digits == 1 || digits == 2)
	{
		if (number >= 1 && number <= 20)
			oneToTwenty(number);
		else if (number >= 20 && number <= 99)
			lastTwo(number);
	}
	else if (digits ==3)
	{
		int firstDigit = number/100;
		oneToTwenty(firstDigit);
		cout<<" Hunder ";
		int lastDigits = (int)((number/100)-firstDigit);
		lastTwo(lastDigits);
	}
	getche();
	return 0;
}

int countDigits(int number)
{
	if (number < 10)
	{
		return 1;
	}
	int count = 0;
	while (number > 0)
	{
		number /= 10;
		count++;
	}
	return count;
}

void oneToTwenty (int number)
{
	switch (number)
	{
		case 1:
			cout<<"One";
			break;
		case 2:
			cout<<"Two";
			break;
		case 3:
			cout<<"Three";
			break;
		case 4:
			cout<<"Four";
			break;
		case 5:
			cout<<"Five";
			break;
		case 6:
			cout<<"Six";
			break;
		case 7:
			cout<<"Seven";
			break;
		case 8:
			cout<<"Eight";
			break;
		case 9:
			cout<<"Nine";
			break;
		case 10:
			cout<<"Ten";
			break;
		case 11:
			cout<<"Eleven";
			break;
		case 12:
			cout<<"Twelve";
			break;
		case 13:
			cout<<"Thirteen";
			break;
		case 14:
			cout<<"Fourteen";
			break;
		case 15:
			cout<<"Fifteen";
			break;
		case 16:
			cout<<"Sixteen";
			break;
		case 17:
			cout<<"Seventeen";
			break;
		case 18:
			cout<<"Eighteen";
			break;
		case 19:
			cout<<"Nineteen";
			break;
		case 20:
			cout<<"Twenty";
			break;
	}
}

void lastTwo (int number)
{
	int firstDigit =  number/10;
	int secondDigit = number%10;
	
	if (firstDigit == 2)
		cout<<"Twenty ";
	else if (firstDigit == 3)
		cout<<"Thirty ";
	else if (firstDigit == 4)
		cout<<"Forty ";
	else if (firstDigit == 5)
		cout<<"Fifty";
	else if (firstDigit == 6)
		cout<<"Sixty ";
	else if (firstDigit == 7)
		cout<<"Seventy ";
	else if (firstDigit == 8)
		cout<<"Eighty ";
	else
		cout<<"Ninety ";
	oneToTwenty(secondDigit);
}
Peter87 (11238)
The problem is on line 29. The calculation of lastDigits is wrong.
coder777 (8444)
line 29 will always be 0. it is (number/100)-(number/100)

so remove line 29 and modify line 120 a bit:
int firstDigit = (number/10)%10;
Last edited on
closed account (j3Rz8vqX)
I've modified these lines:
line 28, 29:
1
2
 
		cout<<" Hundred ";
		int lastDigits = number%100;


line 137:
 
 
	else if (firstDigit == 9)


And it should work, unless I've forgot to mention a change.
aprendiz (21)
Oh what a mistake :).. Thank you guys. Everything is good now.
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