1. Multi-module programming in C
SEEM3460 Tutorial
Multi-module programming in C

2. Multi-module programming in C
SEEM3460 Tutorial
Multi-module programming in C
Before we start:
Please log on to the server
Please recall how to edit text files on Linux/Unix

3. Copy the material Create the directory Copy files mkdir c_multi
cd c_multi
mkdir ask
cd ask
Copy files
cp ~seem3460/distribute/c_multi-module/ask/ask_reverse.c ask_reverse.c
cp ~seem3460/distribute/c_multi-module/ask/ask_palindrome.c ask_palindrome.c

4. ask_palindrome (place to start)
Framework 1
reverse.o
palindrome.o
ask_palindrome (place to start)
ask_reverse

5. ask_palindrome.c (place to start)
Target Structure
reverse.c
reverse.h
palindrome.c
palindrome.h
ask_palindrome.c (place to start)
ask_reverse.c

6. Modularizing Reverse reverse.h ask_reverse.c reverse.c
void reverse(...);
#include <stdio.h> #include <string.h> #include “reverse.h” int main() { ... } void reverse(...) {
#include <string.h> #include “reverse.h” void reverse(...) { ... }

7. Modularizing Reverse Create “reverse.h” and “reverse.c”
How to paste under unix:
Shift+insert, right click (not in x-win32)
With the help of copy and paste
>cp ask_reverse.c reverse.c
>cp reverse.c reverse.h
Edit “reverse.c” and “reverse.h”
Edit “ask_reverse.c”

8. Compile Link .o files as executables: Create .o files:
gcc -c reverse.c
gcc -c ask_reverse.c
Link .o files as executables:
gcc -o ask_reverse ask_reverse.o reverse.o

9. Modularizing palindrome
palindrome.c
palindrome.h
ask_palindrome.c
#include <string.h> #include “palindrome.h” int palindrome(...) { ... }
int palindrome(...);
#include <stdio.h> #include <string.h> #include “palindrome.h” #include “reverse.h” int palindrome(...) { ... } void reverse(...) { int main(...) {

10. Compile Link .o files as executables: Create .o files:
gcc -c palindrome.c
gcc -c ask_palindrome.c
Link .o files as executables:
gcc -o ask_palindrome ask_palindrome.o palindrome.o reverse.o

11. Framework 2 (for your interest)
rectangle.o
replace.o
print_rect.o
label_rect (place to start)
area_rect.o
cp ~seem3460/distribute/c_multi-module/label/label_rect.c label_rect.c