I want to write a function that calculates the number of digits. What is the problem with this code?

Question

I want to write a function that calculates the number of digits. What is the problem with this code?
#include <iostream>
using namespace std;

int f(int x);

int main()
{
int a;
cin >> a;
int b;
b=f(a);
cout<< b << endl;

return 0;
}
int f(int x )
{
int x;
int count=0;
// cin>>x;
while(x>=1)
{
count++;
x/=10;
}
return count;
}

Answer 1

int f(int x);

int main()
{
int a;
cin >> a;
int b;
b=f(a);
cout<< b << endl;

return 0;
}
int f(int x )
{
int x; // 🤔X IS ALREADY A PARAMETER🤔
int count=0;
// cin>>x;
while(x>=1)
{
count++;
x/=10;
}
return count;
}

Answer 2

Do you have a variable naming conflict in function f?

Answer 3

Just a moment

Answer 4

https://code.sololearn.com/cUvUVcP6hSDS/?ref=app