Untitled

#include <iostream>
using namespace std;
long chuslo(int a) {
	int sum = 0;
	if (a > 0) {
		while (a != 0) {
			a /= 10;
			sum++;
		}
	}
	return(sum);
}

int main() 
{
	int f = chuslo(12345);
	cout << f;

}