Sum and average even numbers

10 次查看（过去 30 天）
NONE NONE
NONE NONE 2011-4-14
Write a code that can add all the even numbers less than and including 50 and to find their average.
You can use the basic loop commands,colon operators and basic arithmetic operators.
  10 个评论
显示 8更早的评论
Matt Fig
Matt Fig 2011-4-15
@Matt,
http://bottlecollecting.blogspot.com/
Walter Roberson
Walter Roberson 2011-4-15
There is are some serious questions here suitable for implementation in MATLAB. See the following for details of calculations:
http://www.style.org/unladenswallow/

请先登录，再进行评论。

请先登录，再回答此问题。

回答（4 个）

Matt Tearle
Matt Tearle 2011-4-14
Why bother? The answer is -Inf. Your teacher needs to write more precise questions.
  4 个评论
显示 2更早的评论
Walter Roberson
Walter Roberson 2011-4-16
MATLAB doesn't have any negative integers below -realmax so adding the ones "up to -realmax" is going to get you -realmax .
It is not a priori obvious that one would get -inf rather than nan or some other value when doing the calculation you were probably thinking of, so doing the calculation does become worthwhile.
Matt Tearle
Matt Tearle 2011-4-18
Hah. I just realized that, in my mind, a:dx:b goes "up to b", even if dx < 0. Stupid semantics.

请先登录，再进行评论。

Paulo Silva
Paulo Silva 2011-4-14
)05:2:2(mus
  2 个评论
Sean de Wolski
Sean de Wolski 2011-4-14
That's a pretty sweet emoticon. A cyclops with a button down suit?
Paulo Silva
Paulo Silva 2011-4-14
lol that's funny, it does look weird and cool at the same time :)

请先登录，再进行评论。

Jan
Jan 2011-4-15
The famous Mr. Gauss could solve these calculations in some seconds without a computer. He imagined a table with the largest and smallest element sided by side, and the 2nd largest and 2nd smallest, etc. How many such pairs can you create? How large is the sum of these two elements? Are you able to ask Wikipedia how to use these information to creatre your answer with "basic arithmetic operators" only?
Sean de Wolski
Sean de Wolski 2011-4-14
Okay, I wrote it. Can I have a beer now?
  5 个评论
显示 3更早的评论
Sean de Wolski
Sean de Wolski 2011-4-14
Matt, I thought that was one of the conditions of solving a doit4me?

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Programming 的更多信息

标签

产品

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by