CIS 250 - Course introduction

Objectives

• find course information on syllabus
• use Desire2Learn resources for course
• review some basic Linux/UNIX commands
• write, compile, and run programs on a remote Linux server
• set up user accounts on a Linux server

Preliminaries

• CIS 250 Syllabus
• CIS 250 Honors Syllabus
• Honors Project
• review Desire2Learn resources
• set up accounts on kermit for working on programs
• review how a C++ compiler works (g++)
• coding style and conventions will have to be followed
  • these will be discussed as the semester progresses
  • rudimentary style basics:
    1. indents should be four spaces per indent level
    2. tabs must not be used for indentation
    3. variable names should start with a lowercase letter
    4. do NOT use: using namespace std;
    5. names of constants should be all uppercase
    6. global variables are not allowed
  • comments including name, course, assignment number, and date must be included at the beginning of each program
  • GeoSoft C++ style guidelines
• cplusplus.com: great C++ reference

Getting to your server account

You don't have to be a Unix/Linux expert to do your work in this course, but you do have to know some basics since your programs have to be submitted, compiled, and running on a Linux server. Ask if you have any questions about using Linux during the course.

• your account is on kermit (kermit.kishwaukeecollege.edu)
• kermit is a Linux server
• kermit requires ssh for secure terminal communication
• you can use ssh from a Linux/Mac computer to hook up to kermit
• you can download putty to communicate with kermit from a Windows machine
• your username and password are the same as for other online school resources

Basic Linux/UNIX commands

• pwd: display the current directory name
• cd dirname: go to the directory named dirname
• cd: go to your home directory
• rm filename: delete the specified file
• mkdir dirname: create a directory named dirname
• rmdir dirname: delete a directory named dirname
• ls: display a list of the files in the current directory
• exit: exit current shell
• logout: logout from kermit
• nano filename: a useful text editor on kermit
• man cmd: get help on the command named cmd
• passwd: used to change your password
• mv source dest: move (rename) source to dest
• cp source dest: make a copy of source and name it dest
• chmod 600 filename: restrict a source file so only you can read/write it
• chmod 700 directory: restrict a directory so only you have access
• other commands will be covered as needed or as requested

Compiling your first C++ program on kermit

• all of your work should be done in a directory named cis250
• make a separate directory for each assignment
• let's do a simple Hello program
  • login to kermit
  • create a new cis250 directory if needed: mkdir cis250
  • move to your cis250 directory: cd cis250
  • create a new directory for the hello project: mkdir hello
  • move to the hello directory: cd hello
  • start nano to create the program: nano hello.cpp
  • here's the source:

    #include <iostream>
    using std::cout;
    using std::endl;
    
    int main(int argc, char* argv[]) {
       cout << "Hello, world!" << endl;
       return 0;
    }

  • save the file (Ctrl+O) as hello.cpp
  • exit nano (Ctrl+X)
  • compile your program: g++ -o hello hello.cpp
    • the -o option goes just before a filename; a filename with that name is where the compiled code will be put
    • the last name is the name of the file to compile
    • Note: You will wipe out your source file if you type: g++ -o hello.cpp hello.cpp
  • run your program: ./hello