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C > 05. Simple Functions

1. The stars Function: a void Function Without Arguments
   A function that displays a line of stars on the screen.
2. The stars2 Function: a void Function with One Argument
   A function that displays a line of stars of variable length depending on a numerical value.
3. The stars2 Function Using a Prototype
   The same function as before but with a prototype declared at the top of the program.
4. The factorial Function: One Argument, One Result
   A function that computes the factorial of an integer number.
5. The bigger Function: Two Arguments, One Result
   A function that takes in two numbers and returns the largest value of the two.
6. The Prime Numbers Function
   A function that returns 1 if a number is prime and 0 otherwise.
7. A List of Prime Numbers
   A program displaying the list of all prime numbers between 1 and 1000. It uses the Prime Numbers function.
8. Drawing a Stick figure
   A program that uses functions to display geometric stick figures.
9. The print_rboxed Function
   Displays a real number in a box.
10. The Circle Program (with Helper Fnctions)
    A program that asks the user for the diameter of a circle and prints out its circumference and area calling user-defined functions.
11. The scale Function
    A function that multiplies its first argument by the power of 10 specified by its second argument.

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