Problem : Take an integer as input and print out number equivalents of each number from input. I hacked my thoughts to work in this case but I know it is not an efficient solution.

For instance :

110

Should give the following o/p : 

one
one 
zero

Could someone throw light on effective usage of Arrays for this problem?

#import <Foundation/Foundation.h>

int main (int argc, const char * argv[]) {
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];

    int input, i=0, j,k, checkit;
    int temp[i];

    NSLog(@"Enter an integer :");
    scanf("%d", &input);
    checkit = input;

    while(input > 0)
    {
        temp[i] = input%10;
        input = input/10;
        i++;
    }

    if(checkit != 0)
    {
    for(j=i-1;j>=0;j--)
    {
        //NSLog(@" %d", temp[j]);
        k = temp[j];
        //NSLog(@" %d", k);

        switch (k) {

            case 0:
                NSLog(@"zero");
                break;
            case 1:
                NSLog(@"one");
                break;
            case 2:
                NSLog(@"two");
                break;
            case 3:
                NSLog(@"three");
                break;
            case 4:
                NSLog(@"four");
                break;
            case 5:
                NSLog(@"five");
                break;
            case 6:
                NSLog(@"six");
                break;
            case 7:
                NSLog(@"seven");
                break;
            case 8:
                NSLog(@"eight");
                break;
            case 9:
                NSLog(@"nine");
                break;

            default:
                break;
        }

    }
    }
    else
        NSLog(@"zero");

    [pool drain];
    return 0;
}