how???? please explain

Consider the following code snippet: what will be printed in line 11 ? 1. int c=0; 2. void Func_A (int n) 3. ( 4. if(n== 0) 5. return; 6. C++; 7. Func_A (n/10); 8.) 9. int main() { 10. Func_A(123456789); 11. cout < < C; 12. return 0; } 10 987654321 9876543210 123456789