Functions you will write

double calculate$\_$bill$($char $*$in$\_$file, char $*$customer$)$;

This function will open the file named in file, read the data, and calculate and return the

bill of the customer specified by customer. In case of errors, your function should return an

appropriate error code as described in section $4\mathrm{.}4.$

The formula to calculate the bill b per row is given by

b $=0\mathrm{.}01$ n $+0\mathrm{.}02$ s $+0\mathrm{.}06$ x $$ t

where n is the network usage in megabytes, s is the storage usage in blocks, x is the number of

servers used, and t is the number of hours the service is run. The bill is simply the sum of the

bills of each relevant row.

For example, for the input file

$01/01/2000|$Science$|5|3\mathrm{.}3|71|2/6$

$01/01/2000|$Engineering$|1|1\mathrm{.}3|25|1/3$

$01/02/2000|$Science$|7|1\mathrm{.}5|97|4/15$

for customer Science, the total bill is $3\mathrm{.}72.$

int generate$\_$network$\_$usage$\_$report$($

char $*$in$\_$file, char $*$customer$,$ int year, char $*$out$\_$file

$)$;

This function will open the file named in file, read the data, generate a monthly report for

the customer specified by customer for the year given by year, and output it to the file named

out file. Your function should return an appropriate error code as described in section $4\mathrm{.}4.$

The format of the output is given below:

$01$:

$02$:

$03$:

$...$

$12$:

For example, for the input file

$01/01/2000|$Science$|5|3\mathrm{.}3|71|2/6$

$01/01/2000|$Engineering$|1|1\mathrm{.}3|25|1/3$

$01/02/2000|$Science$|7|1\mathrm{.}5|97|4/15$

$02/02/2000|$Science$|7|1\mathrm{.}5|54|4/15$

$03/02/2000|$Science$|7|1\mathrm{.}5|61|4/15$

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Homework $2$ CS $240-$ Spring $2024$

$04/02/2000|$Science$|7|1\mathrm{.}5|30|4/15$

$05/02/2000|$Science$|7|1\mathrm{.}5|19|4/15$

$06/02/2000|$Science$|7|1\mathrm{.}5|59|4/15$

$07/02/2000|$Science$|7|1\mathrm{.}5|49|4/15$

$08/02/2000|$Science$|7|1\mathrm{.}5|83|4/15$

$09/02/2000|$Science$|7|1\mathrm{.}5|73|4/15$

$10/02/2000|$Science$|7|1\mathrm{.}5|0|4/15$

for customer Science and year $2000,$ the output should be

Science

$01$:$168$

$02$:$54$

$03$:$61$

$04$:$30$

$05$:$19$

$06$:$59$

$07$:$49$

$08$:$83$

$09$:$73$

$10$:$0$

$11$:$0$

$12$:$0$

$2000$

int get$\_$storage$\_$usage$($char $*$in$\_$file, char $*$customer$,$ int year$)$;

This function will open the file named in file, read the data, and calculate and return the

sum of storage used in megabytes for the customer specified by customer for the year given by

year. In case of errors, your function should return an appropriate error code as described in

section $4\mathrm{.}4.$

int get$\_$network$\_$usage$($char $*$in$\_$file, int month, int year$)$;

This function will open the file named in file, read the data, and calculate and return the

sum of network used in megabytes for the specified month and year. In case of errors, your

function should return an appropriate error code as described in section $4\mathrm{.}4.$

Note: Make sure to return the appropriate error code right away if an argument is invalid.

$4\mathrm{.}2$ Input Files

Each input file will contain the compute, network, and storage usage information for all customers

on certain dates. The files will be formatted as follows:

mm$/$dd$/$yyyy$|$college$|$num$\_$server$|$hours$|$network$|$bytes$/$blocks

mm$/$dd$/$yyyy$|$college$|$num$\_$server$|$hours$|$network$|$bytes$/$blocks

$...$

$$ mm $($int$)-$ Month of the record. Must be between $1$ and $12,$ both inclusive.

$$ dd $($int$)-$ Day of the record. Must be between $1$ and $30,$ both inclusive.

$$ yyyy $($int$)-$ Year of the record. Must be non$-$negative.

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Homework $2$ CS $240-$ Spring $2024$

$$ college $($char $[$MAX ID LENGTH$])$ : The Purdue college $($customer$).$

$$ num server $($int$)$ : Number of servers run by the customer. Must be non$-$negative.

$$ hours $($float$)$ : Number of hours that the customer ran their service. Must be non$-$negative.

$$ network $($int$)$ : Total amount of network consumed in megabytes. Must be non$-$negative.

$$ bytes $($int$)$ : Total amount of storage consumed in megabytes. Must be non$-$negative.

$$ blocks $($int$)$ : Total amount of storage consumed in SSD blocks. Must be non$-$negative.

$4\mathrm{.}3$ Header Files

We provide a header file, hw$2.$h$,$ for you. It contains prototypes for each of the functions that you

will write as well as #defines for the constants. You should not alter this file. We will replace it

with the original when grading.

$4\mathrm{.}4$ Error Codes

$$ SUCCESS: Indicates a successful execution.

$$ FILE READ ERR: Indicates that a file cannot be opened for reading.

$$ FILE WRITE ERR: Indicates that a file cannot be opened for writing.

$$ BAD RECORD: Indicates unexpected characters or fields, or the wrong data type in a record.

Use for all invalid entries other than date $($use BAD DATE for that instead$).$

$$ BAD DATE: Indicates that a date is invalid or that a date argument passed as an input to a

function is invalid. You may assume that any date with the month between $1$ and $12($both

inclusive$),$ the day between $1$ and $30($both inclusive$),$ and the year non$-$negative is valid.

$$ NO DATA POINTS: Indicates that the function would operate on no data. This includes if an

input file itself has no data or$,$ for functions that take in arguments, if a file does not have

any data for the specified argument combination.

you should just use

fopen$(),$ fscanf$(),$ and fprintf$()$ and program in C language