Răspuns:
A.
#include <iostream>
using namespace std;
int n, nr;
int main()
{
cout << "Introduceti numarul n: ";
cin >> n;
if (n == 0)
nr = 1;
else
{
while (n)
{
nr++;
n = n / 10;
}
}
cout << "Numarul n are " << nr << " cifre.";
return 0;
}
B.
#include <iostream>
using namespace std;
int n,m,p;
int main()
{
cout<<"Introduceti numarul n: ";
cin>>n;
p=1;
while(n>0)
{if(n%2==1)
{m=(n%10)*p+m;
p=p*10;
}
n=n/10;
}
if(p==1)
cout<<"Numarul are numai cifre pare";
else
{
cout<<m;
}
return 0;
}
