Introduction to Computer Science - Fall 2009
CSCI 151
Lab 4   
Objectives:
practice with basic LINUX commands,
equality and relational operators, if, if else, if else if , statements;
compiling and executing C code.   

LAB 4 consists of PRACTICE PART ONLY

Practice PART:

1. Login to the system using your login name and the initial password
2. Change to your CSCI151 directory: cd CSCI151
3. Create a new directory lab4 under your CSCI151 directory: mkdir lab4
4. Change to lab4 directory: cd lab4
5. All programs that you will write in this lab you will save in your lab4 directory. Important: Start each of your programs with comment part that includes:
   your first and last names
   your e-mail
   today's day
   the name of the program ( the name of the file)
   the short description what this program is doing
   list of the variables with the short description for each variable - name, type, purpose (this information could be written in the declaration of the variable section of your program)
6. In all programs you have to explain what is the meaning of the results that your program is printing. Don't print numbers without any explanation! Be CREATIVE!! Explain, why this output is printed.

7. Program 1
   • Open emacs by typing the following at the LINUX prompt
     emacs MinMax.c & In the file MinMax.c write a C program that prompt the user to enter three integers, read an input and then determines and prints the largest and smallest number among three inputs. The program should print your last and first names, input numbers, and the minimum and maximum among the input numbers.
   • Compile and run your program with different inputs
   • Show me the result

8. Program 2 :
   • Open emacs by typing the following at the LINUX prompt
     emacs digitsGame.c &
   • In the file digitsGame.c write a C program that prompts the user to enter one non-negative 4 digits integer.
   • The program will do the following: if the input number is even, the program will print the digits of the number in the reverse order with the tab space between the digits with appropriate message, and if the nubmer if odd, the program will calculate the sum and the product of the digits and prints the result with the appropriate message.
   • Compile and run your program with different inputs
   • Show me the result

9. Program 3:
   • Write a C program that prompts the user to enter three integers. If the product of the input numbers is larger than the sum of the input numbers, your program prints "Hello" , if the product of the input numbers is equal to the sum of the input numbers, your program prints your name, otherwise your program finds the integer part of the average of the input numbers and outputs tne result. Call you program game.c
   • Compile and run your program with different inputs
   • Show me the program

10. Program 4:
    • Open emacs by typing the following at the LINUX prompt
      emacs rightTriangle.c &
      rightTriangle.c is the name of the file.
      Remember that a C program file name should end with an extension .c
    • In the file rightTriangle.c you will write a C program that prompts the user to enter three non-zero integers, reads an input in a variables a, b and c of type int. The program will determine and print if the input numbers could be the sides of a right triangle.
    • Compile your program
    • Run your program a few times with different inputs
    • Show me the program.