Integer From Input To English

Question

What I'm trying to do is have the user input a number, and then the program reads each digit back in word form. For example:

Input: 517

Output: Five One Seven

It's a simple command-line tool, using NSLogs and scanf to get the input and provide output, nothing too advanced. I have the jist of it, but it only works with one-digit numbers:

    #import <Foundation/Foundation.h>

int main (int argc, const char * argv[]) {
    @autoreleasepool {

        int number;

        NSLog(@"Type your number.");
        scanf("%i", &number);


        if (number == 0) {
            NSLog(@"Zero");
        } else if (number == 1){
            NSLog(@"One");
        } else if (number == 2) {
            NSLog(@"Two");
        } else if (number == 3) {
            NSLog(@"Three"); 
        } else if (number == 4) {
            NSLog(@"Four");
        } else if (number == 5) {
            NSLog(@"Five");
        } else if (number == 6) {
            NSLog(@"Six");
        } else if (number == 7) {
            NSLog(@"Seven");
        } else  if (number == 8) {
            NSLog(@"Eight");
        } else if (number == 9) {
            NSLog(@"Nine");
        } 

    }
    return 0;
}

However, I'm having problems working with more digits. I was thinking of using something like this to split them up:

            right_digit = number % 10;
        NSLog(@"%i", right_digit);
        number /= 10;

But that would output backwards.

Any advice?

Thanks

No, I'm going through a textbook on my own, trying to pick up on the Objective-C language more so than the applications in an iOS app — Jtaylorapps, Mar 30 '12 at 02:13
An interesting tool that does more than this: https://helloacm.com/tools/convert-arabic-numerals-to-english-words/ — justyy, May 07 '17 at 02:45

score 1 · Accepted Answer · answered Mar 30 '12 at 03:57

Use Recursion

void printNumber(int a){
  if(a/10 > 0){
     printNumber(a/10);
  }

  int digit = a%10;
  switch(digit){
  {
    case 0:
       NSLog(@"Zero ");
       break;
    case 1:
       NSLog(@"One ");
       break;
    case 2:
       NSLog("Two ");
       break;
     ....
  }

}

score 0 · Answer 2 · answered Jan 21 '14 at 00:41

0

NSNumberFormatter has a styler that helps handle it for you.

NSNumberFormatter *numberFormatter = [[NumberFormatter alloc] init];
numberFormatter.numberStyle = NSNumberFormatterSpellOutStyle;

answered Jan 21 '14 at 00:41

aug

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score 0 · Answer 3 · edited May 23 '17 at 12:02

0

So you create a list backwards then reverse it, and read the number to the user.

The user won't see any difference in terms of performance.

To do this with an array you can look at this question:

How can I reverse a NSArray in Objective-C?

edited May 23 '17 at 12:02

Community

1
1

answered Mar 30 '12 at 02:11

James Black

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I am able to get it to print the numbers.. but backwards. – Jtaylorapps Mar 30 '12 at 02:38
Reverse the array, then read the numbers from index 0 to the end. – James Black Mar 30 '12 at 13:48

Integer From Input To English

3 Answers3