Answer 1

#include<iostream>
using namespace std;
int odd(int x)
{
int rem,sum=0;
while(x>0)
{
rem=x%10;
if(rem&2!=0)
sum=sum*10+rem;
x=x/10;
}
return sum;
}
int main()
{
int x;
cout<<"Enter an odd number:";
cin>>x;
int z=odd(x);
cout<<z;
}