Skip to content

Latest commit

 

History

History

0x0A-argc_argv

README.md

0x0A. C - argc, argv

Learning Objectives

At the end of this project, you are expected to be able to explain to anyone, without the help of Google:

  • How to use arguments passed to your program
  • What are two prototypes of main that you know of, and in which case do you use one or the other
  • How to use attribute((unused)) or (void) to compile functions with unused variables or parameters

Copyright - Plagiarism

  • You are tasked to come up with solutions for the tasks below yourself to meet with the above learning objectives.
  • You will not be able to meet the objectives of this or any following project by copying and pasting someone else’s work.
  • You are not allowed to publish any content of this project.
  • Any form of plagiarism is strictly forbidden and will result in removal from the program.

Requirements

General

  • Allowed editors: vi, vim, emacs
  • All your files will be compiled on Ubuntu 20.04 LTS using gcc, using the options -Wall -Werror -Wextra -pedantic -std=gnu89
  • All your files should end with a new line
  • A README.md file, at the root of the folder of the project is mandatory
  • Your code should use the Betty style. It will be checked using betty-style.pl and betty-doc.pl
  • You are not allowed to use global variables
  • No more than 5 functions per file
  • The prototypes of all your functions and the prototype of the function _putchar should be included in your header file called main.h
  • Don’t forget to push your header file
  • You are allowed to use the standard library

Tasks

0-whatsmyname.c

Write a program that prints its name, followed by a new line.
  • If you rename the program, it will print the new name, without having to compile it again
  • You should not remove the path before the name of the program

1-args.c

Write a program that prints the number of arguments passed into it.
  • Your program should print a number, followed by a new line

2-args.c

Write a program that prints all arguments it receives.
  • All arguments should be printed, including the first one
  • Only print one argument per line, ending with a new line

3-mul.c

Write a program that multiplies two numbers.
  • Your program should print the result of the multiplication, followed by a new line
  • You can assume that the two numbers and result of the multiplication can be stored in an integer
  • If the program does not receive two arguments, your program should print Error, followed by a new line, and return 1

4-add.c

Write a program that adds positive numbers.
  • Print the result, followed by a new line
  • If no number is passed to the program, print 0, followed by a new line
  • If one of the number contains symbols that are not digits, print Error, followed by a new line, and return 1
  • You can assume that numbers and the addition of all the numbers can be stored in an int

100-change.c

Write a program that prints the minimum number of coins to make change for an amount of money.
  • Usage: ./change cents
  • where cents is the amount of cents you need to give back
  • if the number of arguments passed to your program is not exactly 1, print Error, followed by a new line, and return 1
  • you should use atoi to parse the parameter passed to your program
  • If the number passed as the argument is negative, print 0, followed by a new line
  • You can use an unlimited number of coins of values 25, 10, 5, 2, and 1 cent