CS253 HW3: Arguments, reading from files                

Changes                

Updates to the assignment will be noted here. None yet!                 

Description                

For this assignment, you will write a program called hw3 that improves on your work from HW1. Instead of assuming a range of 0…99, the first two command-line arguments will indicate the inclusive range of acceptable input values. If any arguments remain, they are files to read integers from. If no arguments remain, then read integers from standard input.                 

Sample Run                

Here is a sample run, where % is my prompt.                 

% cat CMakeLists.txt
cmake_minimum_required(VERSION 3.11)
project(hw3)

# Are we in the wrong directory?
if (CMAKE_SOURCE_DIR MATCHES "[Hh][Ww]([0-9])$"
   AND NOT PROJECT_NAME MATCHES "${CMAKE_MATCH_1}$")
    message(FATAL_ERROR "Building ${PROJECT_NAME} in ${CMAKE_SOURCE_DIR}")
endif()

# Using -Wall is required:
add_compile_options(-Wall)

# These compile flags are highly recommended, but not required:
add_compile_options(-Wextra -Wpedantic)

# Optional super-strict mode:
add_compile_options(-fmessage-length=80 -fno-diagnostics-show-option
    -fstack-protector-all -g -O3 -std=c++17 -Walloc-zero -Walloca
    -Wctor-dtor-privacy -Wduplicated-cond -Wduplicated-branches
    -Werror -Wextra-semi -Wfatal-errors -Winit-self -Wlogical-op
    -Wold-style-cast -Wshadow -Wunused-const-variable=1
    -Wzero-as-null-pointer-constant)

# add_compile_options must be BEFORE add_executable.

# Create the executable from the source file main.cc:
add_executable(${PROJECT_NAME} main.cc)

# Create a tar file every time:
add_custom_target(${PROJECT_NAME}.tar ALL COMMAND
    tar -cf ${PROJECT_NAME}.tar *.cc CMakeLists.txt)
% cmake . && make
… cmake output appears here …
… make output appears here …
% cat data

100003
100003 100001 100002 100003 100004
100002


100004 100005

% ./hw3 100000 100009 <data
100001x1 100002x2 100003x3 100004x2 100005x1
100001,100002,100002,100003,100003,100003,100004,100004,100005
% cat data | ./hw3 100000 100100
100001x1 100002x2 100003x3 100004x2 100005x1
100001,100002,100002,100003,100003,100003,100004,100004,100005
% ./hw3 100000 100009 data
100001x1 100002x2 100003x3 100004x2 100005x1
100001,100002,100002,100003,100003,100003,100004,100004,100005
% head d1 d2
==> d1 <==
81 49
64 100 4
16

==> d2 <==
9       36
25      1
% ./hw3 1 100 d1 d2
1x1 4x1 9x1 16x1 25x1 36x1 49x1 64x1 81x1 100x1
1,4,9,16,25,36,49,64,81,100
% ./hw3 1 100 d1 d2 d1 <data
1x1 4x2 9x1 16x2 25x1 36x1 49x2 64x2 81x2 100x2
1,4,4,9,16,16,25,36,49,49,64,64,81,81,100,100
% echo '-4 -12 -4 +0076 -12' | ./hw3 -200 100
-12x2 -4x2 76x1
-12,-12,-4,-4,76

Hints                

• Don’t overcomplicate the arguments. Read from files, if filenames were given. Otherwise, read from standard input.
• strtol() is your friend.

    export STACK_FRAME_LINK_OVERRIDE=ffff-ad921d60486366258809553a3db49a4a

Requirements                

All requirements from HW1 apply, with these modifications:

• Use of the eof() method is permitted.
• Allocate a dynamic array of ints with new[] to hold the counts, and release it with delete[]. No memory leaks are allowed. The array allocated must be exactly the right size needed. Other than that, no dynamic memory is allowed.
• Produce an error message if:
  • either required argument (range of integers) is missing
  • anything that’s supposed to be an integer (arguments or input) isn’t
  • the first numeric argument is greater than the second
  • any file can’t be opened.
  • any integer read isn’t within the acceptable range (the error message must mention the offending integer)

Tar file                

• For each assignment this semester, you will create a tar file, and turn it in.
• The tar file for this assignment must be called: hw3.tar
• It must contain:
  • source files (*.cc)
  • header files (*.h) (if any)
  • CMakeLists.txt
• This command must produce the program hw3 (note the dot):

    cmake . && make

• At least  -Wall must be used every time g++ runs.

How to submit your work:                

In Canvas, check in the file hw3.tar to the assignment “HW3”. It’s due 10:00:00ᴘᴍ MT Saturday, with a 24-hour late period for a 25% penalty.                 

How to receive negative points:                

Turn in someone else’s work.