#include <stdio.h>
int add_odd_digits(int n, int second_n);
int main(void)
{
int n = 12734, second_n = 100;
printf("%d\n", add_odd_digits(n, second_n));
return 0;
}
int add_odd_digits(int n, int second_n)
{
int multiply = 1, odd = 0;
while (n != 0)
{
if (n % 2 != 0)
{
odd += (n % 10) * multiply;
multiply *= 10;
}
n = n / 10;
}
return second_n * multiply + odd;
}
/*
run:
100173
*/