CS1412 Assignment 1: C Programming Environment and Creating Simple Programs


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Goal of this assignment: To be able to 1) install software, 2) use vi editor, 3) use gcc compiler,
and 4) use basic UNIX based folder navigation commands.

1. Every student should be able to download and install a software system. You will need to
install software that allows us to compile and run the C program written by us.

a. If you have a Windows system do the following.

i. Install Cygwin on your system. You may follow
https://cygwin.com/install.html . Ensure that you have selected some
packages like:
lynx, wget, curl, tar, bash-completion, vim, tmux, git, diffutils, make, gccc, gcc-c++, gcc-fortran, openssh
ii. Familiarize yourself with the vi commands by experimenting on your

b. If you have a Mac system do the following.
i. Invoke your terminal software. This link shows how to use the terminal
ii. Install gcc if it is not available.

c. If you have a Linux system, do the following.
i. gcc is usually available on any Linux system. Install it if it is not available.

2. On your computer, create and edit welcome.c file as shown below. Compile/link the
program using gcc, run the generated program. NOTE DON” T copy and paste the
welcome.c but type the program yourself using all of the vi commands. You must
familiarize yourself with the vi editor.
welcome.c program
// Name: Your name here
// Section: Your section here
// Purpose of program:
// This program is a demo program to understand the basics of
// how to create a c file, edit it, save it, compile it and
// execute it.
// Function main begins program execution
int main(void)
int ID;
float shipweight;
CS1412 Programming Principles II,
ID = 4518; //Initialize ID
shipweight = 24.625f; //Initialize Shipping weight
// display the string
printf(” Welcome to C\n”);
//display contents of variables
printf(“The ID of the item is %d\n”, ID);
printf(“The shipping weight of the item is %0.3f\n”, shipweight);
//We have to return
return 0;
} // end function main

To compile and link your source code program in the file named welcome.c in your current
directory, using the following command:
gcc –o executableFileName welcome.c
where executableFileName is the file name for the executable program generated from

To run your executable program, use the following command:
3. During the lab session, install Cygwin and gcc on the lab computer. Work on question 2
again using the Cygwin environment. Enter the welcome.c program code using vi editor.
Demonstrate to your Lab TA, your work for question 2.

4. Write a C program that displays the following information on the screen/display. Also
demonstrate how an executable program is obtained during lab session. Please ensure that
you have adequate comments including the header section and comments around code.
I hear and I forget.
I see and I remember.
I do and I understand.
— Confucius