Converting numbers to words in C++ using SWITCH Statements!!

Question

adoleh 0 Newbie Poster

13 Years Ago

I have to create a program that asks a person to enter a 2 digit number (10-99) and convert it into words. I've been working on this for days and I still don't see what I'm doing wrong! PLEASE HELP ME!!!
EXAMPLE:
27
twenty-seven

#include <iostream>
using namespace std;
int main()
{
	int num;
	int ones_digit = num%10;
	int tens_digit = num/10;

	cout << "Enter a two-digit number:\n";
	cin >> num;

	if (num>=20) && (num<100)
	{
		switch (tens_digit)
		{
			case 2:
				cout << " twenty- ";
				break;
			case 3:
				cout << " thirty- ";
				break;
			case 4:
				cout << " forty- ";
				break;
			case 5:
				cout << " fifty- ";
				break;
			case 6:
				cout << " sixty- ";
				break;
			case 7:
				cout << " seventy- ";
				break;
			case 8:
				cout << " eighty- ";
				break;
			case 9:
				cout << " ninety- ";
				break;
			default:
				cout << " Error ";
		}

		switch (ones_digit)
		{
			case 0:
				cout << " ";
				break;
			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;
			default:
				cout << " Error ";
		}
	}

	if (num>=10) && (num=<19)
	{
		switch (num)
		{
			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;
			default:
				cout << " Error ";
		}
	}
	return 0;
}

c++

Edited 13 Years Ago by WaltP because: Added CODE Tags -- please use them!

9 Contributors
9 Replies
16K Views
10 Years Discussion Span
Latest Post 3 Years Ago Latest Post by emsmary

Red Goose 21 Junior Poster

13 Years Ago

You're doing the calculations before you're getting the number, and since num will be 0 at that point, tens digit and ones digit will always equal zero, no matter what. You need to take in your number THEN do the calculations for tens digit and ones digit.

triumphost 120 Posting Whiz

13 Years Ago

#include <iostream>
#include <windows.h>
#include <math.h>
#include <cmath>
#include <string>
#include <sstream>

using namespace std;

	int num;
	int ones_digit;
	int tens_digit;

int main()
{	
    cout<<"Enter 1 or 2 digits\n\n";
    cin>> num;
    cin.ignore();
    
    string num2;
    stringstream out;
    out << num;
    num2 = out.str();
    num2.length();
    
    ones_digit = num%10;
    tens_digit = num/10;
    
    
    if ((num >= 0) && (num <=19))
    {
       switch(num)
             {
                               case 0: cout<<"Zero";
                               break;
                               
                               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;
                    
                    default: cout<<"Error";
                    break;
             }
    }
    else if((num2.length() == 2) && ((num >= 20) && (num <=99)))
    {
    switch(tens_digit)
    {
                       case 2: cout<<"Twenty";
                       break;
                       
                       case 3: cout<<"Thirty";
                       break;
                       
                       case 4: cout<<"Forty";
                       break;
                       
                       case 5: cout<<"Fifty";
                       break;
                       
                       case 6: cout<<"Sixty";
                       break;
    }
            switch (ones_digit)
		{
			case 0:
				cout << " ";
				break;
			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;
			default:
				cout << "Error";
       }
    }
    
    cout<<"\n";
    system("Pause");
    return 0;
}

emsmary 16 Newbie Poster

3 Years Ago

PLEASE HELP ME FOR MY ASSIGNMENT

Create a C program that will input a number in(digit) range 0 - 2000000 and output its word equivalent.

Test Cases

example 1

input digit: 102
output: one hundred two

example 2
input digit: 1253641
output: one million two hundred fifty three thousand six hundred forty one

example 3
input digit: 0
output: zero

example 4
input digit: -9
output: invalid input
Class comments

PLEASE HELP ME

rproffitt commented: Asking to continue in a decade old discussion isn't a good idea. Start a new discussion with your questions. +16

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Asking to continue in a decade old discussion isn't a good idea. Start a new discussion with your questions.

gerard4143 371 Nearly a Posting Maven · Answer 1 · 2011-02-21T05:20:46+00:00

You have some fundamental problems with your code especially the lack of a proper formating scheme..Also please use code tags.

#include <iostream>
using namespace std;
int main()
{
int num;

cout << "Enter a two-digit number:\n";
cin >> num;

int ones_digit = num%10;//preform these operations
int tens_digit = num/10;//after you get the value for num...not before


if ((num>=20) && (num<100))//if statement was wrong
{
switch (tens_digit)
{
case 2:
cout << " twenty- ";
break;
case 3:
cout << " thirty- ";
break;
case 4:
cout << " forty- ";
break;
case 5:
cout << " fifty- ";
break;
case 6:
cout << " sixty- ";
break;
case 7:
cout << " seventy- ";
break;
case 8:
cout << " eighty- ";
break;
case 9:
cout << " ninety- ";
break;
default:
cout << " Error ";
}

switch (ones_digit)
{
case 0:
cout << " ";
break;
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;
default:
cout << " Error ";
}
}

if ((num >= 10) && (num <= 19))//if statement was wrong
{
switch (num)
{
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;
default:
cout << " Error ";
}
}
return 0;
}

WaltP 2,905 Posting Sage w/ dash of thyme Team Colleague · Answer 2 · 2011-02-21T09:03:07+00:00

I have to create a program that asks a person to enter a 2 digit number (10-99) and convert it into words. I've been working on this for days and I still don't see what I'm doing wrong! PLEASE HELP ME!!!

With what? You didn't bother telling us what the problem is.

spdbalaji 0 Newbie Poster · Answer 3 · 2014-02-15T11:43:02+00:00

#include<iostream.h>
#include<conio.h>
void main()
{
int n;
clrscr();
cout<<"\nEnter the number...;
cin>>n;
switch(n)
{
case1:cout<<"\nThe number is one";break;
case2:cout<<"\nThe number is two";break;
case3:cout<<"\nThe number is three";break;
default:cout<<"\nInvalid number";
}
getch();
}

rubberman 1,355 Nearly a Posting Virtuoso Featured Poster · Answer 4 · 2014-02-15T23:19:43+00:00

What Red Goose said. This bit of code:

int ones_digit = num%10;
int tens_digit = num/10;

Needs to be AFTER you get "num" from cin. You may have other problems, but that was as far as I looked. Also, you may want to verify that it is a number and a number in the range specified.

rubberman 1,355 Nearly a Posting Virtuoso Featured Poster · Answer 5 · 2014-02-15T23:24:28+00:00

@ Red Goose
Your comment "You're doing the calculations before you're getting the number, and since num will be 0 at that point, tens digit and ones digit will always equal zero, no matter what." is not quite correct. As it is currently coded, num will be random garbage (whatever is on the stack at that point), so it may not be zero. As a result, the ones_digit and tens_digit values will definitely be some random number, unless this is running in a debugger! :-) Caveate Programmer! Using unitialized variables is always a roll-of-the-dice, so to speak!

Kenneth_2 0 Newbie Poster · Answer 6 · 2015-02-17T15:14:37+00:00

Kenneth_2 0 Newbie Poster

9 Years Ago

Thats long :)