0x05. C - Pointers, arrays and strings

Description

What you should learn from this project:

• What are pointers and how to use them
• What are arrays and how to use them
• What are the differences between pointers and arrays
• How to use strings and how to manipulate them
• Scope of variables

---

0. 98 Battery st.

• Write a function that takes a pointer to an int as parameter and updates the value it points to to 98.

1. Don’t swap horses in crossing a stream

• Write a function that swaps the values of two integers.

2. This report, by its very length, defends itself against the risk of being read

• Write a function that returns the length of a string.

3. I do not fear computers. I fear the lack of them

• Write a function that prints a string, followed by a new line, to stdout.

4. I can only go one way. I’ve not got a reverse gear

• Write a function that prints a string, in reverse, followed by a new line.

5. A good engineer thinks in reverse and asks himself about the stylistic consequences of the components and systems he proposes

• Write a function that reverses a string.

6. Half the lies they tell about me aren’t true

• Write a function that prints every other character of a string, starting with the first character, followed by a new line.

7. Winning is only half of it. Having fun is the other half

• Write a function that prints half of a string, followed by a new line.

8. Arrays are not pointers

• Write a function that prints n elements of an array of integers, followed by a new line.

9. strcpy

• Prototype: char *_strcpy(char *dest, char *src);

10. Great leaders are willing to sacrifice the numbers to save the people. Poor leaders sacrifice the people to save the numbers

• Write a function that convert a string to an integer.

11. Don’t hate the hacker, hate the code

• Create a program that generates random valid passwords for the program 101-crackme.

---

Author

• Geoffrey Zoref - Gzoref