Implement the source code that turns numbers into English text

Implement the source code that turns numbers into English text for numbers between -2 billion
and 2 billion.
this is off the ebook im having trouble with this chapter
the algorithm is supposed to look like this
1) Break the number up into chunks of three digits
2) For each three-digit chunk, compute the text; append the magnitude of that chunk; append the
chunks together
3) To compute the text of a three-digit chunk, compute the number of hundreds, and convert that
one-digit number to text, and add “hundreds”, appending the text of the two-digit chunk
4) To compute the text of a two-digit chunk, if it’s less than 20, look it up; if it’s greater than 20,
compute the number of tens, and look up the word, and append the text of the one-digit
number

Ok, but what's the problem?

you need to show us that you at least tried to solve this problem.

Hi I haven't thats why im getting confused. I dont want you to show me source code. I just need a bit more explanation if that is ok?

Break the problem down into small manageable steps. Tackle them one at a time.

http://cboard.cprogramming.com/c-pro...t-process.html

You already have a basic algorithm. Start writing code for #1 in your OP. If you get stuck there, show what you have and ask specific questions.

thanks will give it a try.

ok i have written this so far I need to write another function to call the words probably using a string array. Is this the right route to follow?

Code:

---

#include <iostream> //including header files
#include <string>


using namespace std;






int main() //main body of fcn
{
  int num; //declaring integers
  int hundreds;
  int thousands;
  int millions;
  int billions;


  cout << "Enter an a number between -2 billion and 2 billion " << endl; //prompts user for i/p and stores it
  cin >> num;


    if ((num < -2000000000) || (num > 2000000000)) //exits program if not within these limits
    {
        return 0;
    }


    if ((num >= -2000000000) || (num <= 2000000000)) //if within these limits  execute the statement
    {
      hundreds = ((num % 1000)/100); //work out how many hundreds
      cout << hundreds << endl;


      thousands = ((num % 100000)/1000); //work out how many thousdands
      cout << thousands << endl;


      millions = ((num % 10000000)/100000); //work out how many millions
      cout << millions << endl;


      billions = ((num % 1000000000)/1000000); //work out how many billions
      cout << billions << endl;


    }




}

---

Not a bad start. Note that you check the input value on line 25, and exit if it's out of range. Therefore, there is no need to check the number again as you do on line 31.

Also, I believe that "int" is not guaranteed to hold 4 bytes (for a range of ~ +/-2 billion), so you might want to consider using "long" instead.

Variables. Data Types. - C++ Documentation

Code:

---

Enter an a number between -2 billion and 2 billion
1987654321
3
54
76
987

Process returned 0 (0x0)  execution time : 7.768 s
Press any key to continue.

---

Code:

---

Enter an a number between -2 billion and 2 billion
1234
2
1
0
0

Process returned 0 (0x0)  execution time : 1.856 s
Press any key to continue.

---

Did you run and test this? The results are not quite right, so you might want to play around with the logic before moving to the next step. (See how useful the gradual approach to programming is?)

FYI: I'm a 'C' programmer, and have little 'C++' experience, but the help you need seems to be more logic-based than syntax-based, which gives me more flexibility in giving you assistance.

thanks again i see where i have gone wrong. I shall proceed further! Also the gradual approach is much better ; )

hi again! I have managed to sort the code out a lot. Doing bit by bit really helps. However I have got stuck on how to print 10000, 11000, etc onto 100000. I can do one or the other it seems. I have two functions (func5 and func6) that are doing it in my code below but want to try and fit it into one is this possible? I stopped here as I'm guessing I would run into the same problem when I reach higher numbers. Also another silly question (I am a noob!) is that I somehow got my de-bugger to go into its own window and and cannot get it back. I have tried to look in the view but it says it is still there I am using code blocks version 10.05. thanks again

Code:

---

#include <iostream> //including header files#include <string>


using namespace std;


//string array declared
string units[3] [10] = {{"","One","Two","Three", "Four", "Five", "Six","Seven","Eight", "Nine"},{"Eleven", "Twelve", "Thirteen","Fourteen", "Fifteen", "Sixteen", "Seventeen","Eighteen", "Nineteen"},{"Ten", "Twenty", "Thirty", "Fourty", "Fifty", "Sixty", "Seventy", "Eighty", "Ninety"}};


//function defs
void func6  (int unsigned long i);
void func5 (int unsigned long i);
void func4 (int unsigned i);
void func3 (int unsigned i);
void func2 (int unsigned i);
void func1 (int unsigned t);
void func (int unsigned i);






int main() //main body of fcn
{
long int num; //declaring integers


int j=1;


  while (j==1) //start of while loop
  {




        cout << "Enter a number between -2 billion and 2 billion " << endl; //prompts user for i/p and stores it
        cin >> num;




        if ((num < -2000000000) || (num > 2000000000)) //exits program if not within these limits
        {
            cout << "Number Invalid " << endl;
            return 0;
        }
        else
        {
            func(num);  //call functions
            func1(num);
            func2(num);
            func3(num);
            func4(num);
            func5(num);
            func6(num);
        }
    }
}


void func6 (int unsigned long i) //start of fcn5
{
    int unsigned long t; //declares integer t


    if (i>9999&&i<100000) //if within these limits statement executes
    {
        t=i%1000; //works out remainder
        i=i/1000; //works out new i value
        cout << units[1][i-11] << " Thousand "; //prints out result whilst looking up table


        if (t<10) //if remainder within limits calls function
        func(t);
        else if (t>=10&&t<20)
        func1(t);
        else if (t>19&&t<=100)
        func2(t);
        else if (t>99&&t<1000)
        func3(t);


    }
}




void func5 (int unsigned long i) //start of fcn5
{
    int unsigned long t; //declaring integer
    if (i>9999&&i<100000) // if value within these limits then execute
    {
        t=i%10000; //works out remainder
        i=i/10000; //works out new value of i
        cout << units[2][i-1] << " Thousand "; //prints out result whilst looking up table


        if (t<10) //calls function if remainder within these limits
        func(t);
        else if (t>=10&&t<20)
        func1(t);
        else if (t>=20&&t<100)
        func2(t);
        else if (t>=100&&t<1000)
        func3(t);
 
    }
}






void func4 (int unsigned i) //start of function 4
{
    int unsigned t; //declares integer
    if (i>=1000&&i<10000) //if within these limits execute fcn
    {
        t=i%1000; //works out remainder
        i=i/1000; //works out new value of i
        cout << units[0][i] << " Thousand "; //prints out result whilst looking up table
       
        if (t<10) //calls function if remainder within limits
        func(t);
        else if (t>=10&&t<20)
        func1(t);
        else if (t>=20&&t<100)
        func2(t);
        else if (t>=100&&t<1000)
        func3(t);


    }
}


void func3 (int unsigned i) //start of fcn 3
{
    int unsigned t; //delcares integer
    if (i>=100&&i<1000) //statement executes if within limits
    {
        t=i%100; //works out remainder
        i=i/100; //works out new value
        cout << units[0][i] << " Hundred "; //prints out result whilst looking up table
       
        if (t<10)  //if remainder within these limits calls previous functions
        func(t);
        else if (t>=10&&t<20)
        func1(t);
        else if (t>=20&&t<100)
        func2(t);
    }
}


void func2(int unsigned i) //start of fcn2
{
    int unsigned t; //declares integer


    if (i>=20&&i<100) //if i within limits statement executes
    {
            t=i%10; //works out remainder
            i=i/10; //works out new i value
            cout << units[2][i-1] ; //prints result out whilst looking up table


            if (t < 10) //if remainder within these limits calls function
            func(t);
    }
}


void func1(int unsigned i) //start of func1
{
    int unsigned t; //declares integer
    if (i>=10&&i<20) //if i within these limits statement executes
    {
        t=i%10; //works out remainder
        cout << units[1][t-1] << endl; //prints out value whilst looking up table
    }
}


void func(int unsigned t) //start of fcn
{
    if (t<10) //if statement less than 10 executes
    {
        cout << " " << units[0][t] << endl; //prints out result whilst looking up table.
    }
}

---

Instead of writing the initialiser for your array on one line, break it up across several lines to make it more readable.

Instead of giving your functions names like func6, func5, etc, give them descriptive names.

ok duely noted will do in future. Any suggestions on my problem?

Quote:

---

Originally Posted by mp252

Also another silly question (I am a noob!) is that I somehow got my de-bugger to go into its own window and and cannot get it back. I have tried to look in the view but it says it is still there I am using code blocks version 10.05. thanks again

---

This is a guess on the CB issue,
Try "View" -> "Perspectives" -> "Delete Current"
This normally deletes the CB window layout and restores it to a default.

Once, you get it the way you want.
I suggest "View" -> "Perspectives" -> "Save Current" and give it a unique name.

Edit: Your coding problem is NOT worth my time until you re-post your code with real descriptive function names!

Tim S.

Here is my code with the rectified function names. The problem that I am having is with the printTenThousands function. At the moment it is printing the value from the look up table however it is ignoring the remainder, I think I know the solution to this. The other problem I keep running into is with printing 20000, 30000 ....90000. This is to do with the i value. I'm not sure how to go about this.

Code:

---

#include <iostream> //including header files
#include <string>


using namespace std;


//string array declared
string units [10] = {"One","Two","Three", "Four", "Five", "Six","Seven","Eight", "Nine"};
string teens [10] = {"Ten", "Eleven", "Twelve", "Thirteen","Fourteen", "Fifteen", "Sixteen", "Seventeen","Eighteen", "Nineteen"};
string tens [10] = {"Twenty", "Thirty", "Fourty", "Fifty", "Sixty", "Seventy", "Eighty", "Ninety"};


//function defs
void printTenThousands (int unsigned long i);
void printThousands (int unsigned i);
void printHundreds(int unsigned i);
void printTens(int unsigned i);
void printTeens(int unsigned t);
void printUnits (int unsigned i);


int main() //main body of fcn
{
long int num; //declaring integers


int j=1;


  while (j==1) //start of while loop
  {
        cout << "Enter a number between -2 billion and 2 billion " << endl; //prompts user for i/p and stores it
        cin >> num;


        if ((num < -2000000000) || (num > 2000000000)) //exits program if not within these limits
        {
            cout << "Number Invalid " << endl;
            return 0;
        }
        else
        {
            printUnits(num);  //call functions
            printTeens(num);
            printTens(num);
            printHundreds(num);
            printThousands(num);
            printTenThousands(num);
        }
    }
}


void printTenThousands (int unsigned long i) //start of fcn to print hundred thousands
{
    int unsigned long t; //declares integer t


    if (i>9999&&i<100000) //if within these limits statement executes
    {
        t=i%1000;//works out remainder
        t=t*1000;
        i=i/1000; //works out new i value
        cout << teens[i-10] << " Thousand "; //prints out result whilst looking up table
       
        if (t<10) //if remainder within limits calls function
        printUnits(t);
        else if (t>9&&t<20)
        printTeens(t);
        else if (t>19&&t<100)
        printTens(t);
        else if (t>99&&t<1000)
        printHundreds(t);


    }
}


void printThousands (int unsigned i) //start of func to print thousands
{
    int unsigned t; //declares integer
    if (i>999&&i<10000) //if within these limits execute fcn
    {
        t=i%1000; //works out remainder
        i=i/1000; //works out new value of i
        cout << units[i-1] << " Thousand "; //prints out result whilst looking up table


        if (t<10) //calls function if remainder within limits
        printUnits(t);
        else if (t>9&&t<20)
        printTeens(t);
        else if (t>=20&&t<100)
        printTens(t);
        else if (t>99&&t<1000)
        printHundreds(t);


    }
}


void printHundreds (int unsigned i) //start of fcn to print hundreds
{
    int unsigned t; //delcares integer
    if (i>99&&i<1000) //statement executes if within limits
    {
        t=i%100; //works out remainder
        i=i/100; //works out new value
        cout << units[i-1] << " Hundred "; //prints out result whilst looking up table


        if (t<10)  //if remainder within these limits calls previous functions
        printUnits(t);
        else if (t>9&&t<20)
        printTeens(t);
        else if (t>=20&&t<100)
        printTens(t);
    }
}


void printTens (int unsigned i) //start of fcn to print tens
{
    int unsigned t; //declares integer


    if (i>19&&i<100) //if i within limits statement executes
    {
            t=i%10; //works out remainder
            i=i/10; //works out new i value
            cout << tens[i-2] ; //prints result out whilst looking up table


            if (t<10) //if remainder within these limits calls function
            printUnits(t);
    }
}


void printTeens (int unsigned i) //start of func to print teens
{
    int unsigned t; //declares integer
    if (i>9&&i<=19) //if i within these limits statement executes
    {
        t=i%10; //works out remainder
        cout << teens[t-1] << endl; //prints out value whilst looking up table
    }
}


void printUnits (int unsigned t) //start of fcn to print units
{
    if (t<10) //if statement less than 11 executes
    {
        cout << " " << units[t-1] << endl; //prints out result whilst looking up table.
    }
}

---

Quote:

---

Originally Posted by mp252

1) Break the number up into chunks of three digits

---

Please point out in the code where you are doing this step.

Edit: I do NOT think you are doing that step.

I suggest doing that step and storing the values into variables or an array.

Edit2: After doing that print out the value with commas in the number.

Input: 1234567890
Output: 1,234,567,890

Edit3: Then try to print out the numbers as words.
Output2: One Billion Two Hundred Thirty-four million five hundred sixty seven thousand and eight hundred ninety

Tim S.

Thank you for the help again! you must be getting bored of looking over this problem. I have sorted this problem out and I am printing out the correct results. However I am having difficulty appending all of the three chunks together including there magnitude; for example my result if I put an input of 123456789 is giving me;
Seven Hundred and Eighty Nine
Four Hundred and Fifty Six
One Hundred and Twenty Three
below is what I have done with my code;

Code:

---

#include <iostream> //including header files
#include <string>


using namespace std;


//string array declared
string units [10] = {"One","Two","Three", "Four", "Five", "Six","Seven","Eight", "Nine"};
string teens [10] = {"Ten", "Eleven", "Twelve", "Thirteen","Fourteen", "Fifteen", "Sixteen", "Seventeen","Eighteen", "Nineteen"};
string tens [10] = {"Twenty", "Thirty", "Fourty", "Fifty", "Sixty", "Seventy", "Eighty", "Ninety"};
//fcn defs
void printMillions(int unsigned i);
void printHundreds(int unsigned i);
void printThousands(int unsigned i);
void printTens(int unsigned i);
void printTeens(int unsigned i);
void printUnits(int unsigned i);


int main() //main body of fcn
{
  int num; //declaring integers
  int hundreds;
  int thousands;
  int millions;


    cout << "Enter an a number between -2 million and 2 million " << endl; //prompts user for i/p and stores it
    cin >> num;


    if ((num < -200000000) || (num > 200000000)) //exits program if not within these limits
    {
        return 0;
    }
    else
    {
      hundreds = (num % 1000); //work out how many hundreds
      printHundreds(hundreds);


      thousands = (num/1000);
      thousands = (thousands%1000); //work out how many thousdands
      printThousands(thousands);


      millions = (num/1000000); //work out how many millions
      printMillions(millions);
    }
      cout << "Output 1: " << millions << "," << thousands << "," << hundreds << endl; //prints out result with comma


}


void printMillions (int unsigned i) //start of millions fcn
{
    int unsigned t; //declares integer
    t=i%100; //works out remainder
    i=i/100; //works out value of i
    cout << units[i-1] << " Hundred and "; //diplays hundred value
    if (t>19&&t<100) // works out remainder value
        printTens(t);
    else if (i>9&&i<=19)
        printTeens(t);
    else if (t<10)
        printUnits(t);
}


void printThousands(int unsigned i) //start of print thousands fcn
{
    int unsigned t; //declares integer
    t=i%100; //works out remainder
    i=i/100; //works out i value
    cout << units[i-1] << " Hundred and "; //prints out hundred value
      if (t>19&&t<100) // if remainder within these limits calls function
        printTens(t);
    else if (i>9&&i<=19)
        printTeens(t);
    else if (t<10)
        printUnits(t);
}


void printHundreds(int unsigned i) //start of print hundreds fcn
{
    int unsigned t; //declares integer
    t=i%100; //works out remainder
    i=i/100; //works out i value
      cout << units[i-1] << " Hundred and "; //prints out hundred value
      if (t>19&&t<100) //if remainder within these limits calls function
        printTens(t);
    else if (i>9&&i<=19)
        printTeens(t);
    else if (t<10)
        printUnits(t);
}


void printTens (int unsigned i) //start of fcn to print tens
{
    int unsigned t; //declares integer
    if (i>19&&i<100) //if i within limits statement executes
    {
            t=i%10; //works out remainder
            i=i/10; //works out new i value
            cout << tens[i-2] ; //prints result out whilst looking up table




            if (t<10) //if remainder within these limits calls function
            printUnits(t);
    }
}




void printTeens (int unsigned i) //start of func to print teens
{
    int unsigned t; //declares integer
    if (i>9&&i<=19) //if i within these limits statement executes
    {
        t=i%10; //works out remainder
        cout << teens[t-1] << endl; //prints out value whilst looking up table
    }
}


void printUnits (int unsigned t) //start of fcn to print units
{
    if (t<10) //if statement less than 11 executes
    {
        cout << " " << units[t-1] << endl; //prints out result whilst looking up table.
    }
}

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