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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int f(int n)
  5. {
  6. 	int somma=0;
  7.  
  8. 	while (n!=0)
  9. 	{
  10. 	somma= somma + n%10;
  11. 	n=n/10;
  12. 	}
  13.  
  14. 	if (somma>10) {return f(somma);}
  15. 	else {return somma;}
  16. }
  17.  
  18. int main() {
  19.  
  20. 	int numero;
  21. 	cout<<"inserisci un numero naturale"<<endl;
  22. 	cin>>numero;
  23. 	cout<<"f("<<numero<<")=" <<f(numero);
  24.  
  25. 	return 0;
  26. }
Success #stdin #stdout 0.01s 5300KB
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stdin
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741
stdout
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inserisci un numero naturale
f(741)=3
https://ideone.com/sqVGb8
language:
C++ (gcc 8.3)
created:
2 days ago
visibility:
public

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