2 simple C program questions.

1. How do you declare a variable s containing the string hello?

My attempt:
char s = "hello";

2. Why is it that when the following code executes:

int i = -1;
int k = i++;

k is -1, isn't k 0?

Thank you!

Both of these questions should be easy to answer after having read some introductory material on C, so re-read your book/notes on strings and on post-increment.

Okay I found out the first one is chars[] = "hello";

But for the second question I cannot find it in my notes :S.

I was thinking that i++ only works when it is on it's own, ex:

int i = -1;
i++;
int k = i;

Originally Posted by justiliang

Okay I found out the first one is chars[] = "hello";

With the space you had before, yes

Originally Posted by justiliang

But for the second question I cannot find it in my notes :S.

I was thinking that i++ only works when it is on it's own, ex:

If you cannot find "post-increment", then just try "increment", or look back to where the operator was introduced to you. You might also recall pre-incement, e.g., ++i. The crux of this question is how does i++ differ from ++i

OOOO, yeah I found increment.

So i++ is a postfix position and it looks like

int k = i++;

is the same as

int k = i;
i = i + 1;

?

Thanks for the help

Originally Posted by justiliang

So i++ is a postfix position and it looks like

int k = i++;

is the same as

int k = i;
i = i + 1;

?

For the purposes of this discussion, yes, you have the right idea.