CS 12 - Lab 1

• Getting a quick introduction to Linux
• Writing a quick C++ program under Linux
• Learning to use the CS Department turn-in system if you haven't already

Introduction to Linux

• ls - list the contents of your current directory. For those of you that have used the MS-DOS prompt, this is similar to dir under MS-DOS/Windows.
  
  
• cd a - move into the directory a
  
  
• cp a b - copy file a to file b
  
  
• mv a b - move file a to b, removing the original
  
  
• rm a - delete file a
  
  
• mkdir a - create a directory called a
  
  
• rmdir a - remove empty directory called a
  
  
• man command - display online help on command
  
  
• man -k word - search for help on word
  
  

g++

#include <iostream.h>

void main()
{
    cout << "Hello World!" << endl;
}

> g++ hello.cc
In file included from /usr/include/c++/3.2/backward/iostream.h:31,
                 from hello.cc:1:
/usr/include/c++/3.2/backward/backward_warning.h:32:2: warning:
#warning This file includes at least one deprecated or antiquated
header. Please consider using one of the 32 headers found in section
17.4.1.2 of the C++ standard. Examples include substituting the <x>
header for the <x.h> header for C++ includes, or <sstream> instead of
the deprecated header <strstream.h> . To disable this warning use
-Wno-deprecated. 
hello.cc:6: `main' must return `int'

In file included from /usr/include/c++/3.2/backward/iostream.h:31,
                 from hello.cc:1:
/usr/include/c++/3.2/backward/backward_warning.h:32:2: warning:
#warning This file includes at least one deprecated or antiquated
header. Please consider using one of the 32 headers found in section
17.4.1.2 of the C++ standard. Examples include substituting the <x>
header for the <x.h> header for C++ includes, or <sstream> instead of
the deprecated header <strstream.h> . To disable this warning use
-Wno-deprecated. 

hello.cc:6 `main' must return `int'

#include <iostream>

int main()
{
    cout << "Hello World!" << endl;
}

> g++ hello.cc
hello.cc: In function `int main()':
hello.cc:5: `cout' undeclared (first use this function)
hello.cc:5: (Each undeclared identifier is reported only once for each function
   it appears in.)
hello.cc:5: `endl' undeclared (first use this function)

#include <iostream>

int main()
{
    std::cout << "Hello World!" << std::endl;
}

#include <iostream>

using namespace std;

int main()
{
    cout << "Hello World!" << endl;
}

> g++ hello.cc
>

> g++ hello.cc -o hello

> ./hello
Hello World!

>

> g++ -W -Wall -Werror -pedantic myprog.cc -o myprog

Assignment

• Create a new directory, possibly called "lab1"
• Change into that directory
• Open a new file in Emacs called "lab1.txt."
• Add your name, the date, and your cs username to the top of your file.
• In a new terminal window, perform the following operations:
  • Create a new directory called "lab1testdir"
  • Change into that directory
  • Launch emacs, save a new file called "testfile"
  • Close emacs
  • Make a copy of "testfile" called "copyfile"
  • Move "copyfile" to "movefile"
  • Delete "testfile"
  • Delete "movefile"
  • Change into your home directory (either "cd .." or just "cd")
  • Remove the directory "lab1testdir"

> ./numchar
a
97
$
36
~
126
^D
>

Miscellaneous Tasks

• Learn three of the most common Emacs keyboard shortcuts: Save, Quit, and Save As. Write down instructions for using them.
• Find a command line program that will let you count the number of words in a text file. Write down what that program is and how to use it.
• Find a fast way of viewing the contents of a text file from the terminal, without opening an editor (that is, Emacs or vi or anything that will let you make changes to the file.)
• In one or two sentences, describe the program "diff." Use the man page or the Internet to find information about it. Try it out.
• Send a question to the mailing list, and respond to at least one mailing list question tonight after lecture.
• What does the command "echo Hello there > newfile.txt" do?
  
  

Lab Grading

© 2004 UC Riverside Department of Computer Science & Engineering. All rights reserved.