如果DSNTIPF面板字段中的CCSID值不正确，字符转换也将产生不正确的结果。
If the CCSID values of the DSNTIPF panel fields are not correct, character conversion produces incorrect results.
例如，我们将看到为什么寻找不正确的输入是一个错误，而且攻击者如何能经常使用非法的负数(而不使用“-”字符)就可以潜入。
For example, we'll see why looking for incorrect input is a mistake, and how attackers can often sneak in illegal negative Numbers without using the "-" character.
从设计的角度看，有些其他的选择是有问题的；例如，使用字符串来承载运算符就有可能出现小的输入错误，最终会导致结果不正确。
From a design perspective, some other choices are questionable; for example, the use of Strings to hold the operators opens up the possibility of small typos leading to erroneous results.
应用推荐