Thread: Setting value back?

Say I have the following code below, and I want to print out the original value of a, how would I do that?

Code:

  printf("Enter a positive number: ");
  scanf("%d", &a);

  if(a > 0){
    while(a > 0){
      digits = a % 10;
      a = a / 10;
      if(digits == 0) printf(" ");
      p++;
    }
  }

As in, the value before the loop? Do something like

Code:

original_value_of_a = a;

before the loop, and then print original_value_of_a.

Of course, that's cheating, since your assignment is probably to use the loop to print a correctly. In that case, you should re-examine what's going on in your loop and decide what you want to print (hint: it's not " ").

Oh, my assignment is to find the persistence of a number. I figured out the algorithm for it, but when it came to resetting the value to print it back out stumped me.

Also, how would I be able to loop the scanf until EOF has been entered without pasting that repeatedly?

Originally Posted by blurx

Also, how would I be able to loop the scanf until EOF has been entered without pasting that repeatedly?

Put it in a loop?

Search the FAQ for looping until end of file.

Interesting.
http://en.wikipedia.org/wiki/Persistence_of_a_number

If your algorithm is the code above, then it's far from complete.