C - Pointers, arrays and strings

• 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 strigs and how to manipulate them
• Scope of variables

0-reset_to_98.c

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

• Prototype: void reset_to_98(int *n);.

1-swap.c

A function that swaps the values of two integers.

• Prototype: void swap_int(int *a, int *b);.

2-strlen.c

A function that returns the length of a string.

• Prototype: int _strlen(char *s);.

3-puts.c

A function that prints a string, followed by a new lne, to stdout.

• Prototype: void _puts(char *str);.

4-print_rev.c

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

• Prototype: void print_rev(char *s);.

5-rev_string.c

A function that reverses a string.

• Prototype: void rev_string(char *s);.

6-puts2.c

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

• Prototype: void puts2(char *str);

7-puts_half.c

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

• Prototype: void puts_half(char *str);.
• The function will print the second half of the string.
• If the number of character is odd, the function will print the last n characters of the string, where n = (length_of_the_string - 1) / 2.

8-print_array.c

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

• Prototype: void print_array(int *a, int n);.
• Where n is the number of elements in the array to be printed.
• Numbers will be separated by a comma, followed by a space.
• The numbers will be displayed in the same order as they are stored in the array.

9-strcpy.c

A function that copies a string pointed to by src, including the terminating null byte (\0), to the buffer pointed to by dest.

• Prototype: char *_strcpy(char *dest, char *src);.
• Returns a pointer to dest.