Найти частное произведений четных и нечетных цифр четырехзначного числа

#include <iostream.h>
main()
{
int a,a1,a2,a3,a4,b,c;
cout«"Vvedit' chuslo - ";
cin»a;
a1=n/1000;
a2=(n/100)-(k*10);
a3=(n/10)-(k*100)-(l*10);
a4=n%10;
 
if(a1%2==0)
cout«" parne"«endl;
else
cout"ne parne";
 
if(a2%2==0)
cout«" parne"«endl;
else
cout"ne parne";
 
if(a3%2==0)
cout«" parne"«endl;
else
cout"ne parne";
 
if(a4%2==0)
cout«" parne"«endl;
else
cout"ne parne";

int pr1=1;
int pr2=1;
while (n)
{
int k=n%10;
if(k%2)
 pr1*=k;
else
 pr2*=k;
n/=10;
}

#include <iostream>
#include <conio.h>
main()
{
int a,a1,a2,a3,a4,b,c;
std::cout<<"Vvedit' chuslo - ";
std::cin>>a;
a1=a/1000;
a2=(a/100)-(a1*10);
a3=(a/10)-(a1*100)-(a2*10);
a4=a%10;
 
if(a1%2==0)
std::cout<<" parne"<<std::endl;
else
std::cout<<"ne parne"<<std::endl;
 
if(a2%2==0)
std::cout<<" parne"<<std::endl;
else
std::cout<<"ne parne"<<std::endl;
 
if(a3%2==0)
std::cout<<" parne"<<std::endl;
else
std::cout<<"ne parne"<<std::endl;
 
if(a4%2==0)
std::cout<<" parne"<<std::endl;
else
std:: cout<<"ne parne"<<std::endl;
int pr1=1;
int pr2=1;
while (a)
{
int a1=a%10;
if(a1%2)
 pr1*=a1;
else
 pr2*=a1;
a/=10;
}
std::cout<<a;
getch();
}

x=pr1/pr2;
std::cout<<x;}

double x=(double)pr1/(double)pr2;
std::cout<<x;