Number to Word

[rickymarks]

I was reading my C++ book and wanted to practice what i was reading. I encountered a programming challenge which was to make a program that converts numbers from
0-9999 to words.

ex. 4578-> four thousand five hundred and seventy eight

i already did my code (as you can see) but i only put up this topic for people to discuss more efficient ways or simply different ways of doing this program.

  #include<iostream>
#include<string>
using namespace::std;


class Numbers {

private:
	int num;

public:
	static string twoDigit[];
	 Numbers()
	{ num=0;}
	void setNumber(int number)
	{ num=number;}
	int getNumber()
	{ return num;}

	void print()
	{
		if(num>=1000)
		{
			int thousand;
			thousand=(num%10000-num%1000)/1000;
			cout<<twoDigit[thousand]<<" thousand ";
		}//end if

		if(num>=100)
		{
			int hundred;
			hundred=(num%1000-num%100)/100;
			cout<<twoDigit[hundred]<<" hundred and ";
		}//end if
		if(num>=0)
		{
			int ten;
			ten=num%100;
			cout<<twoDigit[ten]<<endl;
			//cout<<ten<<endl;
		}//end if

	}//end void

};

string Numbers::twoDigit[100]={"zero","one","two","three","four","five","six","seven","eight","nine",
				"ten","eleven","twelve", "thirteen","fourteen","fifteen","sixteen","seventeen","eighteen","nineteen",
				"twenty","twenty-one","twenty-two","twenty-three","twenty-four","twenty-five","twenty-six",
				"twenty-seven","twenty-eight","twenty-nine","thirty","thirty-one","thirty-two","thirty-three",
				"thirty-four","thirty-five","thirty-six","thirty-seven","thirty-eight","thirty-nine",
				"forty","forty-one","forty-two","forty-three","forty-four","forty-five","forty-six","forty-seven",
				"forty-eigth","forty-nine","fifty","fifty-one","fifty-two","fifty-three","fifty-four","fifty-five",
				"fifty-six","fifty-seven","fifty-eight","fifty-nine","sixty", "sixty-one","sixty-two","sixty-three",
				"sixty-four","sixty-five","sixty-six","sixty-seven","sixty-eight","sixty-nine","seventy","seventy-one",
				"seventy-two","seventy-three","seventy-four","seventy-five","seventy-six","seventy-seven",
				"seventy-eight","seventy-nine","eighty","eighty-one","eighty-two","eighty-three","eighty-four",
				"eighty-five","eighty-six","eighty-seven","eighty-eight","eighty-nine","ninety","ninety-one",
				"ninety-two","ninety-three","ninety-four","ninety-five","ninety-six","ninety-seven",
				"ninety-eight","ninety-nine"};

int main ()
{

	int number;
	Numbers conversion;

	cout<<"Enter a number between the range of 0-9999 and the program"<<endl<<"will convert it to words."<<endl;
	cin>>number;

	if(number<0||number>9999)
	{
		cout<<"Error.Number is out of range."<<endl;
		cout<<"Enter a number between the range of 0-9999 and the program"<<endl<<"will convert it to words."<<endl;
		cin>>number;
	}
	conversion.setNumber(number);
	conversion.print();

	system("pause");
	return 0;

}

[metulburr]

but i only put up this topic for people to discuss more efficient ways or simply different ways of doing this program

switch out the if condition in main for a while loop. If you enter an incorrect number twice, the program ends. get rid of system pause

[rickymarks]

thanks for noticing...i originally thought of doing it a while..guess i had something else on my mind haha

[S6k9GNh0]

You can actually do this methodically... especially if you're dealing with the decimal system (probably with other number systems as well but I don't know how).

Let's say you want to do be able to convert up to 5 digits to words. You can divide the fifth, fourth, third, second, and first digit to determine which number it actually is.

(53424) / 10000 = 5
(53424 - (50000)) / 1000 = 3
(53424 - (50000 + 3000)) / 100 = 4
(53424 - (50000 + 3000 + 400)) / 10 = 2
(53424 - (50000 + 3000 + 400 + 20)) = 4

Given that you know each number (supposing you figure out the pattern above), you can translate that to English numerics which also has a pattern.

[Smac89]

This is a bit off topic, but I made this a while ago and all it does is to write back the number you typed not the words though. Just thought I should share with you.

http://ideone.com/bdlRgH