Find the c program to print the alternate digits in a number

Question

Take the input value of n as n=12345 and output will be 135

Answer 1

So you want to make a number from the odd digits?
If yes then try something like this:

while(n>0){
if(n%10%2!=0)
nr=nr*10+(n%10);

n/=10
}

cout<<nr;