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Question: Why does the following code not return an index out of bounds error? (c++)?

(Posted by: floyd t on 2010-01-25 23:16:40)

Void main(){ char a[10]= "hello "; cout < <a[17] < <endl; }

Posted by: Pete S on 2010-01-25, 23:24:32

C+ + isn't like Java, there isn't much built in Exception checking. So typically the variable a gets declared on the stack, which is a specified size for your program. As long as you don't get to some point outside of your program's allocated memory space from the operating system, C+ + isn't going to stop you. In this case, you're just accessing some other memory in your program, probably in its stack space, which doesn't cause a major problem. The code of course is still wrong, but C+ + isn't going to keep you from shooting yourself in the foot unlike Java and other languages.

Posted by: Paul on 2010-01-26, 01:23:30

There is no array bounds checking in C or C+ + . You would need a language like Pascal for that. Also note that "void main " is illegal.