C/Visual C - Tengo un problema en mi codigo

#include<iostream>

using namespace std;

int main(){

int d,n,i;

cout<<"Ingrese un numerio ";cin>>n;

while(n>0){

   d=n%10;

   n=n/10;

   i=d;

}

cout<<"inverso: "<<i<<"\n";

}

#include<iostream>

using namespace std;

int main() {

  int d,n,i=0,j;

  int inverso[10];

  cout<<"Ingrese un numerio ";cin>>n;

  while(n > 0){

    d = n % 10;

    n = n / 10;

    inverso[i] = d;

    i++;

  }

  cout<<"inverso:" << endl;

  for (j=0;j<i; j++)

    cout << inverso[j];

  return 0;

}

int main() {

	int d, n, n2, i=0, c=0;

	cout << "Ingrese un numerio "; cin >> n;

	n2 = n;

	while (n2 > 0)

	{

		d = n2 % 10;

		n2 = n2 / 10;

		c++;

	}

	while (n>0) {

		d = n % 10;

		n = n / 10;

		i += d * pow(10, c-1);

		c--;

	}

	cout << "inverso: " << i << "\n";

}