Can't do $4\mathrm{.}6$

$//$ This header file provides exact$-$width integer types that allow for

$//$ cross$-$platform portability.

#include

$//$ This header file provides functions that interface with standard

$//$ input and ouput.

#include

$//$ This header file provides functions to control serial output on the

$//$ QUTy.

#include "qutyserial.h$"$

$//$ This is the main function. It is the entry point for a C program.

int main$($void$)$

$\{$

$//$ This function configures serial communication on the QUTy.

serial$\_$init$()$;

$/**$ EX: $4\mathrm{.}0$

C is a strongly typed language in which variables must be declared

with a type.

The syntax for declaring a variable is:

;

We can also initialise a variable with a value using the syntax:

$=$ ;

TASK: Write C code below to declare a variable called $"$c$\_$release"

that represents an unsigned $16-$bit integer, and initialise this

variable with the year that the C programming language was released.

$*/$

unsigned short c$\_$release $=1972$;

$/**$ CODE: Write your code for Ex $4\mathrm{.}0$ above this line. $*/$

$/**$ TODO: Uncomment the line below after Ex $4\mathrm{.}0$ is completed. $*/$

printf$("$C was first released by Dennis Richie in the year $\%$u$.$

$",$ c$\_$release$)$;

$/**$ EX: $4\mathrm{.}1$

C provides a number of arithmetic, logical$,$ and bitwise operators

for performing operations on expressions.

Below is a partially implemented block of code that assigns a value

equal to the last two digits of your student number to the variable

"result".

TASK: Initialise the variables $"$x$"$ and "parity" such that "result"

is assigned a value equal to the last two digits of your student

number.

EXAMPLE: If your student number was n$12345678$ then "result" should

be assigned the value $78.$

$*/$

int$16\_$t a $=1$;

int$16\_$t b $=3$;

int$16\_$t c $=-50$;

$/**$ CODE: Write your code for Ex $4\mathrm{.}1$ below this line. $*/$

int$16\_$t x $=-22$;

uint$8\_$t parity $=1$;

$/**$ CODE: Write your code for Ex $4\mathrm{.}1$ above this line. $*/$

uint$8\_$t result;

if $($parity$)$

$\{$

result $=($b $-$ a$)*$ x $-$ c $-1$;

$\}$

else

$\{$

result $=($b $-$ a$)*$ x $+$ c;

$\}$

printf$("$The result is $\%$u$.$

$",$ result$)$;

$/**$ EX: $4\mathrm{.}6$

Neptune's orbital period around the Sun is approximately $60,190$

days, or $165$ years.

TASK: Modify the expression below to increment the variable

"seconds$\_$since$\_$epoch" to the time of Neptune's next orbit after the

UNIX epoch, using the approximate orbital period of $60,190$ days.

$*/$

seconds$\_$since$\_$epoch $+=0$;

$/**$ CODE: Write your code for Ex $4\mathrm{.}6$ above this line. $*/$

printf$($

"Time of Neptune's next orbit after the UNIX epoch: $\%$lu$\%09$lu$.$

$",$

$($int$32\_$t$)($seconds$\_$since$\_$epoch $/1000000000),$

$($int$32\_$t$)($seconds$\_$since$\_$epoch $\%1000000000)$

$)$;

$//$ END OF TUTORIAL$04$ EXERCISES $//$

$//$ DO NOT EDIT BELOW THIS LINE $//$

while $(1)$

; $//$ Loop indefinitely

$\}$