help me do while function

12 次查看（过去 30 天）
THANH NGUYEN
THANH NGUYEN 2013-2-26
Prompt the user to enter a value for height in inches (59-78) and weight in pounds (90-350). I don't know what I can't do that. I enter the height is 50, but it doesn't require me input again. it just show enter the weight.
inches = input('Enter the height in inches (59-78): ');
while (inches <59 && inches>78)
disp('Enter the height in inches (59-78): ');
end
pounds = input('Enter the weight in pounds (90-350): ');
while (pounds <90 && pounds > 350)
pounds = input('Enter the weight in pounds (90-350): ');
end

请先登录，再回答此问题。

采纳的回答

Sean de Wolski
Sean de Wolski 2013-2-26
You are yusing && operators indicating that x has to be less than 59 and greater than 78. This isn't possible!
You probably mean to have a ||, the or operator.

更多回答（3 个）

THANH NGUYEN
THANH NGUYEN 2013-2-26
how about Enter F or M for gender. while gender is not equal to F gender is not equal to M
what is the notation for that? Thanks
  1 个评论
Sean de Wolski
Sean de Wolski 2013-2-26
Use strcmp
doc strcmp
Yopu may also need the ~ operator or not
doc not
E.g:
~strcmp('Sean','F')

请先登录，再进行评论。

THANH NGUYEN
THANH NGUYEN 2013-2-26
编辑：Walter Roberson 2013-2-26
gender = input('Is the person a female or male? Enter F or M: ','s');
while (gender ~= 'F' || gender ~= 'f' || gender ~= 'M' || gender ~= 'm')
gender = input('Is the person a female or male? Enter F or M: ','s');
end
It keeps asking me enter the input all over and over even I type M,m,f,F. What's wrong with this
  1 个评论
Walter Roberson
Walter Roberson 2013-2-26
If the gender is 'F' then it is not 'M' so the "gender ~= 'M'" part would be true. No matter what you enter, one of the tests is going to be true, and you have used "or" between the parts. Perhaps you should not have used "or".
You should also have used strcmp() like Sean wrote.

请先登录，再进行评论。

THANH NGUYEN
THANH NGUYEN 2013-2-26
I don't know how to do it. Can someone give an example to make my dump head understand how to do it? Thanks.

类别

在 Help Center 和 File Exchange 中查找有关 Matrices and Arrays 的更多信息

标签

Community Treasure Hunt

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

Start Hunting!

Translated by