RPGLE中如何获取角色类型变量的长度？
RPGLE中有没有简单的方法可以直接返回字符和类型变量的长度？我这里所说的长度并不是D-spec中规定的长度。我说的是字符串中有意义的字符的实际数量。假设一个字符类型变量定义为50个字符长，并为其赋值“Hello world!”，那么我想要的长度是12，即从“H”到“!”。前导和尾随空白将被忽略。有什么简单的方法可以做到这一点吗？
Is there any easy way to directly return the length of character and type variable in RPGLE? The length I am talking about here is not the length specified in the D-spec. I am talking about the actual number of meaningful characters in a string. Let's say a character type variable is defined to be 50 characters long, and it is assigned with value 'Hello world!', then the length I want is 12, which is from 'H' to '!'. The leading and trailing blank is ignored. Is there any simple way to do this?
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您可以使用
%len(%trimr(field))，它会在检查长度之前修剪尾随空格。%triml修剪前导空格（左侧）%trimr修剪尾随空格（右侧）%trim修剪前导和尾随空格You can use
%len(%trimr(field)), which trims trailing spaces before checking the length.%trimltrims leading spaces (on the left)%trimrtrims trailing spaces (on the right)%trimtrims leading and trailing spaces看起来您要查找长度的字段是固定字符字段，例如
如果我们执行 eval msg = 'Hello, World!'那么 msg 不包含“Hello, World!” - 它包含“你好，世界！” ' 也就是说，它有一堆空白来将其填充到 40 个字符。根据定义，这就是固定长度字段的工作方式。
%trimr() 可以很好地处理这些字符，它甚至有一个可选参数来定义应该修剪哪些字符。
另一方面，如果您要使用可变长度字段
，然后执行 eval msg = 'Hello, World!'那么该字段实际上只包含分配给它的字符。在这种情况下，不需要%trimr()； %len() 将返回字段的当前长度。
It looks like the field you are trying to find the length of is a fixed character field, like
If we do an eval msg = 'Hello, World!' then msg does not contain 'Hello, World!' - it contains 'Hello, World! ' That is, it has a pile of blanks to pad it out to 40 characters. That's how fixed length fields work by definition.
%trimr() can work very well with these, and it even has an optional parameter to define which characters should be trimmed.
On the other hand, if you were to use a varying length field
and then did an eval msg = 'Hello, World!' then the field actually contains only the characters assigned to it. In this case, no %trimr() is needed; %len() will return the current length of the field.