C11: Function Calls

Content

C11: Function Calls
- Exercise
- Exercise
- Exercise
- Exercise
Possible Solution

Always make reasonable choices in your C program for your variable types.
Identifiers used in your implementation should be consistent with the pseudo-code.
In all examples the global variable is initialized with 5. But try different values:
- Make sure you compute \(0!\) correct.
- What do you noticw if \(n!\) is larger than \(255\)?

Exercise

Write a C program that realizes the following pseudo code:

Global variable: n = 5

Function factorial(n)
    result <- 1
    for i = 2, ..., n
        result <- result * i

Main program:
    return factorial(n)

Exercise

Write a C program that realizes the following pseudo code:

Global variable: n = 5

Function factorial(n)
    result <- 1
    while n > 1
        result <- result * n
        n      <- n - 1

Main program:
    return factorial(n)

Exercise

Write a C program that realizes the following pseudo code:

Global variable: n = 5

Function factorial(n)
    if n > 1
        return n*factorial(n-1)
    else
        return 1

Main program:
    return factorial(n)

Exercise

Make experiments with the handout examples.