1. CS/COE 0449 (term 2174) Jarrett Billingsley
C - Basics
CS/COE 0449 (term 2174)
Jarrett Billingsley

2. Class announcements Well I was gonna start using Tophat today...
But a significant proportion of you haven't signed up yet 8)
SO UH
GET ON THAT
Unless you're planning on dropping?
Which you should do by next Wednesday, the 18th (add/drop ends)
But please let me know what the situation is!!!!!
Also is anyone unable to log into thoth?
1/10/2017
CS/COE term 2174

3. Caveats about the book...
1/10/2017
CS/COE term 2174

4. It's a good book, Brent. Its info on C is perfectly fine. BUT...
Its info on most other things is adorably outdated.
Specifically info about platforms and integer sizes.
It's a fun time capsule from 1991, when MS-DOS was popular, Windows had no memory protection, 16-bit CPUs on PCs were still commonplace, and source control software didn't exist.
1/10/2017
CS/COE term 2174

5. The compilation toolchain
1/10/2017
CS/COE term 2174

6. How programs are compiled
#include <stdio.h>
int main() {
printf("Hello!\n");
return 0; }
hello.c
hello.obj
helper.obj
dogs.obj
libc.a/lib
hello.exe
Linker
hello.obj
Compiler
1/10/2017
CS/COE term 2174

7. What about assembler?
Book mentions compiler outputting assembly, not object files.
Mmmmnnnnneeeaahhhhhhnnnnnnnnnnn......
1/10/2017
CS/COE term 2174

8. Okay time for C for real (feel free to log into thoth and try things out)
1/10/2017
CS/COE term 2174

9. Printing stuff! printf! String and character literals!
Escape sequences!
1/10/2017
CS/COE term 2174

10. Operators!!! Mathematical! Logical! Comparison! Bitwise!
Augmentation assignments!
'crements!
1/10/2017
CS/COE term 2174

11. Variables! Variable names! What's in a variable by default?
char* variables!
1/10/2017
CS/COE term 2174

12. Comments! /* */ in all versions of C. // in C99+.
Can you use // in C89 mode?
Technically, no.
Many compilers allow it, even in C89 mode, unless "strict".
1/10/2017
CS/COE term 2174

13. Numbers!
Decimal, hex, and.... octal??
1/10/2017
CS/COE term 2174

14. Control structures if, if-else, while, do-while, switch-case
for loops...
Can you declare a variable inside the loop?
OOOOooo only in C99+
1/10/2017
CS/COE term 2174