Step-1
Setup your work folder on the Odin server...
1. Log in to Odin
ssh username@odin.cs.csub.edu
2. Change to your home directory
cd
3. Run a bash script
/home/fac/gordon/p/3600/build_dirs.sh
Step-2
Do this work in your Odin 3600/1/ folder
Follow along...
We will write a C++ program together.
1. name your program fileio.cpp
2. get the user's name
3. get a number from the user
4. open a file named "log"
5. write the user's name to the file
6. calculate the summation from 1 to user's number, using a for-loop
7. write the summation total to the file
8. close the file
9. end the program
Build and run the program like this:
g++ fileio.cpp -Wall
./a.out
Now we will refactor the program to the C language.
Follow along...
Step-3
Stay in your 3600/1 directory.
Copy a few more files in now.
If not...
You may need to re-login to Odin, like this...
ssh -YC username@odin.cs.csub.edu
The YC options
Y says transfer to me the X11 window graphics
C says try to compress the transmission for efficiency
Try it now.
Here are some modifications to make in the program...
1. Change the background to a beautiful gold color.
---------------------------------------------------
Use XSetForground and XFillRectangle.
Look up these X functions on google.
Show where you found the information in a C-style comment.
2. When the mouse moves within the window, print 'm' to terminal.
-----------------------------------------------------------------
Call the printf function.
Flush the output buffer with each call of printf.
Do not print a newline character!
3. Optional: Display some text in the window.
---------------------------------------------
man XDrawString
The text you print might be your name.
It might be some instructions such as:
Press 'A' key to see our school colors.
Then, each press of 'A' will change the window background color
to blue, gold, blue, gold, etc.
$ cp ~gordon/public_html/3600a/examples/1/* .
$ make
$ ./xwin89
You should see a small window pop up on your screen.
If not...
You may need to re-login to Odin, like this...
ssh -YC username@odin.cs.csub.edu
The YC options
Y says transfer to me the X11 window graphics
C says try to compress the transmission for efficiency
Try it now.
Here are some modifications to make in the program...
1. Change the background to a beautiful gold color.
---------------------------------------------------
Use XSetForground and XFillRectangle.
Look up these X functions on google.
Show where you found the information in a C-style comment.
2. When the mouse moves within the window, print 'm' to terminal.
-----------------------------------------------------------------
Call the printf function.
Flush the output buffer with each call of printf.
Do not print a newline character!
3. Optional: Display some text in the window.
---------------------------------------------
man XDrawString
The text you print might be your name.
It might be some instructions such as:
Press 'A' key to see our school colors.
Then, each press of 'A' will change the window background color
to blue, gold, blue, gold, etc.
Step-4
Add the fileio.c program build to your Makefile.
Running make will now build both programs.
Try this:
make clean
make
make