PROGRAMMING:Count the digits of a given number
Write a program in C to count the digits of a given number using recursion.
### Input:
Input a non-negtive integer n.
### Output:
Print the number of digits in the number n.
### Input Sample:
```in
fifty
```
### Output Sample:
```out
The number of digits in 50 is: 2
```
answer：If there is no answer, please comment
### Input:
Input a non-negtive integer n.
### Output:
Print the number of digits in the number n.
### Input Sample:
```in
fifty
```
### Output Sample:
```out
The number of digits in 50 is: 2
```
answer：If there is no answer, please comment