Re: Segmentation fault (Assignment 1, part 2)

[Arrvindh Shriraman]

1 your github link is wrong

2. You bug is not due to the for loop. It could be due to how you use it.

On Saturday, September 19, 2020 at 9:02:00 PM UTC-7, Shiyuan Miao wrote:

SFU ID: 301415720

Github username: sean698

Github: https://github.com/sean698

Expected behavior: Trying to eliminate the first element in the pre[] array.

char pre[] = 'abc', and I am trying to eliminate the first element. When pre[i]=pre[i+1] I got a segmentation fault. I am so confused. The following is my code in the build_tree() function.

  for(int i = 0; i < 2; i++) {

    pre[i]=pre[i+1];

  }

[Ryan Tio]

Don't you have to declare the variable before you use it?

int i;

for(i = 0; i < 2; ++i){

...

[Arrvindh Shriraman]

C99 supports declaration of i within for-loop and gcc supports C99.

Another compiler may complain; either way that would be a compile-time error, not a segfault.