First Understanding C pointer

Now I have the problem, and then through the book to get the following conclusions. Hope to point out the mistakes together to learn.

First look at the following code:

650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M00/74/B8/wKioL1YnevzTqM6oAAARehnEBXw304.gif "title=" 123. GIF "alt=" Wkiol1ynevztqm6oaaarehnebxw304.gif "/>

This code is wrong: because you define a pointer variable of type int, arr, but you pass + + is its point to other people's space, so it will error.

The error is as follows:

650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M02/74/BB/wKiom1Yne6bApadxAAARmzc-mcI586.gif "title=" 321. GIF "alt=" Wkiom1yne6bapadxaaarmzc-mci586.gif "/>

Summarize:

So if you want to execute arr++, arr must point to an array of type int.

First Understanding C pointer