The program converts given number to individual digits and print words, the program only prints all the digits of a number in just equivalent words, but it is not a meaningful sentence. 

Example input:

456

325

-653

Example Output:

Four Five Six

Three Two Five

please enter valid number

The invalid numbers are any special symbols or negative numbers. 

include

int main()

{
int num,rem=0,sum=0;

printf("enter the number :");

scanf("%d",&num);

while(num!=0)

{

    rem=num%10;

    sum=sum*10+rem;

    num=num/10;

}

while(sum!=0)

{

    rem=sum%10;

    switch(rem)

    {

    case 0:
        printf("Zero ");

        break;

    case 1:
        printf("One ");

        break;

    case 2:
        printf("Two ");

        break;

    case 3:
        printf("Three ");

        break;

    case 4:
        printf("Four ");

        break;

    case 5:
        printf("Five ");

        break;

    case 6:
        printf("Six ");

        break;

    case 7:
        printf("Seven ");

        break;

    case 8:
        printf("Eight ");

        break;

    case 9:
        printf("Nine ");

        break;

    default:
        printf("please enter valid number ");
        exit(0);

    }

    sum=sum/10;

}

return 0;

}