CSCE 150A - Problem Solving Using Computers Laboratory - Spring 2009
Lab Assignment 2 - 01/22/2009
Name:
Section: 8:00 11:00 12:30 6:30
Problem 1: “Hello World!”
In this problem, we will write the first program anyone ever writes.
1. Write a program in a file hello.c that displays “Hello World” in the command line.
2. Compile using the command gcc -o hello hello.c
3. Run the program using the command ./hello
4. Show the instructor your output.
Problem 2: Variables
Copy hello.c to variables.c. You will rewrite the main() method to perform the following actions:
1. Store the integer value 12 in a variable called inches per foot.
2. Store the character ‘A’ in a variable called myGrade.
3. Store the decimal value 2.718282 in a variable called euler.
4. Store the decimal value 3.141592653589793 in a variable called PI (requires precision!).
5. Output the value of these variables in order using printf, in the following format:
variablename = value
Be sure to put each expression on a new line. Write the printf placeholders you used for each variable
in the table below.
Variable Placeholder
inches per foot
myGrade
euler
PI
Compile your program to the executable variables.
Q: What command did you use to compile the program?
Answer:
Run your program, and show the output to the instructor.