How do you Make A Repeat-Until Loop in C++? As opposed to a standard While or For loop. I need to check the condition at the end of each iteration, rather than at the beginning.
Uhh ... This is pretty sad. Emil hit submit sooner than I did ... The "accepted" should go to him ...
Adrien
2009-07-02 23:44:10
You have less rep, and it's an extremely simple question, so I'll gladly give it to you. :)
Emil H
2009-07-02 23:47:51
As jalf said, though: If you want an do until loop rather than a do while loop you'll have to negate the condition.
Emil H
2009-07-02 23:48:40
Thanks. :) It sill feels unfair, though.
Adrien
2009-07-02 23:48:47
Thanks a ton for your help, you guys! SO is the best!
2009-07-02 23:49:42
Clarified the example slightly ...
Adrien
2009-07-02 23:52:26
The code in the answer doesn't look like C++ code. Only if `null` is an instance of type `Planet`.
Kirill V. Lyadvinsky
2009-07-03 05:01:35
Sorry, I was more interested in getting the point across than in showing perfect C++ code. Happy now?
Adrien
2009-07-04 19:00:45
If you really wanted to, you could do `#define repeat do` and `#define until(cond) while(!(cond))`, but anyone who resorts to that kind of preprocessor abuse should be shot.
Adam Rosenfield
2009-07-04 19:10:01
#define true false and #define false true have always been among my favorites.
Adrien
2009-07-04 19:40:46
Please, do not use defines(even as a joke). Use template functions.@Adrien, your code is better now, but `condition` still undefined ;)~~~
Kirill V. Lyadvinsky
2009-07-06 12:15:48
+3
A:
When you want to check the condition at the beginning of the loop, simply negate the condition on a standard while loop:
while(!cond) { ... }
If you need it at the end, use a do ... while loop and negate the condition:
do { ... } while(!cond);
Zifre
2009-07-02 23:54:39