整数到字符串转换时出错
我正在 Windows XP 上使用 Delphi 7 进行编程。程序的这一部分正在为 opendialog 定义标题，我遇到了一个非常奇怪的问题。
出现错误的代码如下，
od_cap := 'Select data set ' + intToStr(n_data_sets);
其中 od_cap 是字符串，n_data_sets 是整数。出现的错误是地址 0040459a 处的 EAccessViolation...我已将问题范围缩小到由 inttostr 转换引起，因为当我有 od_cap 时它仍然崩溃:= inttostr(2)。更奇怪的是，第一次计算这条线时，它可以工作，但每次第二次都会崩溃。
我想不出任何原因，而且我没有足够的经验来知道可能导致这种情况的任何错误。我认为这就是您应该需要的所有信息，但请随时询问更多信息。
I am programming in Delphi 7 on Windows XP. This part of the program is defining a caption for the opendialog and I have a really strange problem.
The code with the error is as below
od_cap := 'Select data set ' + intToStr(n_data_sets);
where od_cap is a string and n_data_sets is an integer. The error that arises is EAccessViolation at address 0040459a... I have narrowed the problem down to being caused by the inttostr conversion because it still crashes when I have od_cap := inttostr(2). The more strange thing is that first time it computes this line, it works but then crashes the 2nd time round every time.
I cannot think of any reason why this might be and I am not experienced enough to know any bugs that might cause this. I think this is all the information you should need but feel free to ask for more.
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IntToStr()在转换期间不会引发 AV。更有可能发生的情况是od_cap变量不是有效的String变量，例如如果它是已释放对象的成员，那么当它被分配给。IntToStr()does not raise an AV during conversion. What is more likely happening is theod_capvariable is not a validStringvariable, such as if it is a member of an object that has been freed, so an AV occurs when it is assigned to.