CS253 HW0: Light Bulb Joke

Purpose

The purpose of this assignment is to make sure that you can follow instructions, login to a Linux system, compile a C++ program, and check in homework. This way, you’re sure that your login and password work before you need them for homework #1. This assignment is not optional.

Description

In this assignment, you will write a program called hw0. It will answer the question, “How many CU students does it take to change a light bulb?”

Sample run

In the following example, what you type looks like this. The percent sign, “%”, is my shell prompt.

% cat hw0.cc

#include <iostream>

using namespace std;

int main() {
    // How many CU students does it take to change a light bulb?
    cout << "Three—one to hold the light bulb and two to debate\n"
	 << "whether an LED or a CFL bulb harms the environment more!\n";
    return 0;
}

% cat Makefile

# To compile your code, do this command: make
# To produce a tar file, do this: make tar
# To clean up: make clean

# You are required to at least use -Wall for warnings.
# More -W flags are even better.

CXXFLAGS=-Wall -Werror -Wextra -Wfatal-errors
assignment=hw0

$(assignment): $(assignment).o
	g++ $(CXXFLAGS) -o $@ $^

tar:
	tar -cv $(MAKEFILE_LIST) *.cc >$(assignment).tar

clean:
	rm -f $(assignment) $(assignment).tar *.o *.gch

% make

g++  -Wall -Werror -Wextra -Wfatal-errors  -c -o hw0.o hw0.cc
g++ -Wall -Werror -Wextra -Wfatal-errors -o hw0 hw0.o

% ./hw0

Three—one to hold the light bulb and two to debate
whether an LED or a CFL bulb harms the environment more!
%

Rules

You may not use C-style <stdio.h> or <cstdio> facilities, such as printf, puts, or putc.
- Instead, use cout.
The output must end with a newline.
- Newlines do not separate lines—newlines terminate lines.
We will compile your program as shown above.
- If that generates warnings, you will lose a point.
- If that generates errors, you will lose all points.
There is no automated testing/pre-grading/re-grading.
- Test your code yourself. It’s your job.
- Yes, even if you only change it a little bit.
- Yes, even if all you do is add a comment.
You will not be graded on the quality of your humor.
- However, if you duplicate my example joke, you will lose points.
- That’s because plagiarism is bad.
- You can’t copy, even if you do give credit—I require original work.
Turn in a tar file called hw0.tar containing a Makefile and a single C++ source file, hw0.cc.
- Yes, .cc, not .cp, .cxx, .cpp, .CPP, .c++, or .C.
Those lines in the Makefile that look like they start with eight spaces? Those are tab characters. It matters.
Your Makefile must use at least -Wall when compiling.

How to submit your homework:

Use web checkin, or Linux checkin:

    ~cs253/bin/checkin HW0 hw0.tar

How to receive negative points:

Turn in someone else’s work.

CS253: Software Development with C++

Spring 2018