0x02-functions_nested_loops

0x02. C - Functions, nested loops

0. _putchar mandatory

Write a program that prints Holberton, followed by a new line.

• The program should return 0

1. I sometimes suffer from insomnia. And when I can't fall asleep, I play what I call the alphabet game mandatory

Write a function that prints the alphabet, in lowercase, followed by a new line.

• Prototype: void print_alphabet(void);
• You can only use _putchar twice in your code

2. 10 x alphabet mandatory

Write a function that prints 10 times the alphabet, in lowercase, followed by a new line.

• Prototype: void print_alphabet_x10(void);
• You can only use _putchar twice in your code

3. islower mandatory

Write a function that checks for lowercase character.

• Prototype: int _islower(int c);
• Returns 1 if c is lowercase
• Returns 0 otherwise

FYI: The standard library provides a similar function: islower. Run man islower to learn more.

4. isalpha mandatory

Write a function that checks for alphabetic character.

• Prototype: int _isalpha(int c);
• Returns 1 if c is a letter, lowercase or uppercase
• Returns 0 otherwise

FYI: The standard library provides a similar function: isalpha. Run man isalpha to learn more.

5. Sign mandatory

Write a function that prints the sign of a number.

• Prototype: int print_sign(int n);
• Returns 1 and prints + if n is greater than zero
• Returns 0 and prints 0 if n is zero
• Returns -1 and prints - if n is less than zero

6. There is no such thing as absolute value in this world. You can only estimate what a thing is worth to you mandatory

Write a function that computes the absolute value of an integer.

• Prototype: int _abs(int);

FYI: The standard library provides a similar function: abs. Run man abs to learn more.

7. There are only 3 colors, 10 digits, and 7 notes; it's what we do with them that's important mandatory

Write a function that prints the last digit of a number.

• Prototype: int print_last_digit(int);
• Returns the value of the last digit

8. I'm federal agent Jack Bauer, and today is the longest day of my life mandatory

Write a function that prints every minute of the day of Jack Bauer, starting from 00:00 to 23:59.

• Prototype: void jack_bauer(void);
• You can listen to this soundtrack while coding :)

9. Learn your times table mandatory

Write a function that prints the 9 times table, starting with 0.

• Prototype: void times_table(void)
• Format: see example

10. a + b mandatory

Write a function that adds two integers and returns the result.

• Prototype: int add(int, int);

11. Holberton School, 98 Battery Street, San Francisco CA 94111 mandatory

Write a function that prints all natural numbers from n to 98, followed by a new line.

• Prototype: void print_to_98(int n);
• Numbers must be separated by a comma, followed by a space
• Numbers should be printed in order
• The first printed number should be the number passed to your function
• The last printed number should be 98
• You are allowed to use the standard library

12. The World looks like a multiplication-table, or a mathematical equation, which, turn it how you will, balances itself #advanced

Write a function that prints the n times table, starting with 0.

• Prototype: void print_times_table(int n)
• If n is greater than 15 or less than 0 the function should not print anything
• Format: see example

13. Nature made the natural numbers; All else is the work of women #advanced

If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23. Write a program that computes and prints the sum of all the multiples of 3 or 5 below 1024 (excluded), followed by a new line.

• You are allowed to use the standard library

14. In computer class, the first assignment was to write a program to print the first 100 Fibonacci numbers. Instead, I wrote a program that would steal passwords of students. My teacher gave me an A #advanced

Write a program that prints the first 50 Fibonacci numbers, starting with 1 and 2, followed by a new line.

• The numbers must be separated by comma, followed by a space ,
• You are allowed to use the standard library

15. Even Liber Abbaci #advanced

Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be: 1, 2, 3, 5, 8, 13, 21, 34, 55, 89. By considering the terms in the Fibonacci sequence whose values do not exceed 4,000,000, write a program that finds and prints the sum of the even-valued terms, followed by a new line.

• You are allowed to use the standard library

16. In computer class, the first assignment was to write a program to print the first 100 Fibonacci numbers. Instead, I wrote a program that would steal passwords of students. My teacher gave me an A+ #advanced

Write a program that finds and prints the first 98 Fibonacci numbers, starting with 1 and 2, followed by a new line.

• The numbers should be separated by comma, followed by a space ,
• You are allowed to use the standard library
• You are not allowed to use any other library (You can’t use GMP etc…)
• You are not allowed to use long long, malloc, pointers, arrays/tables, or structures
• You are not allowed to hard code any Fibonacci number (except for 1 and 2)