#include $"/$public$/$read$.$h$"$

#include

#include

#include

#include

using namespace std;

void die$()\{$

cout $<<$ "You dun goofed.

$"$;

exit$(0)$;

$\}$

int main$()\{$

$//$This is equivalent to string filename; cout $<<$ "Please enter a filename

$"$; cin $>>$ filename;

$//$But on one line instead of three, because I$\text{'}$m cool like that

string filename $=$ read$("$Please enter a filename:

$")$;

ifstream File$($filename$)$;

if $(!$File$)\{$

die$()$;

$\}$

int k;

File $>>$ k;

if $($File$.$fail$()||$ k $<2)\{$

die$()$;

$\}$

vector cases$($k$)$;

for $($int i $=0$; i $<$ k; i$++)\{$

File $>>$ cases$[$i$]$;

if $($File$.$fail$())\{$

die$()$;

$\}$

$\}$

int value $=0$;

for $($int i $=0$; i $<$ k; i$++)\{$

value $+=$ cases$[$i$]$;

$\}$

while $($true$)\{$

int b;

cout $<<$ "Please enter a briefcase to open:

$"$;

cin $>>$ b;

cout$<<$"That briefcase held $"<<$ cases$[$b$]<<"$ dollars

$"$;

value $-=$ cases$[$b$]$;

cases$[$b$]=-1$;

k$--$;

$//$cout$<<"$ I will offer you $$"<<$ value$/$k$<<"$ dollars to walk away.

$"$;

if $($b $==-1)\{$

cout $<<"$ You won $"<<$ value $/$ k $<<"$ dollars!

$"$;

break;

$\}$

if $($b $<0||$ b $>=$ k $||$ cases$[$b$]==-1)\{$

die$()$;

$\}$

$/*$ cout $<<$ "That briefcase held $"<<$ cases$[$b$]<<"$ dollars

$"$;

value $-=$ cases$[$b$]$;

cases$[$b$]=-1$;

k$--$;

$*/$

if $($k $==1)\{$

for $($int i $=0$; i $<$ cases.size$()$; i$++)\{$

if $($cases$[$i$]!=-1)\{$

cout $<<$ "You won $"<<$ cases$[$i$]<<"$ dollars!

$"$;

break;

$\}$

$\}$

$\}$

$\}$

cout $<<"$ I will offer you $$"<<$ value $/$ k $<<"$ dollars to walk away.

$"$;

return $0$;

$\}$

For this assignment:

$0)$ Prompt the user with: "Please enter a filename:

$"$;

$1)$ You will read a filename in from cin, which will be a single word.

You will open that file.

$2)$ That file will contain:

The number of briefcases $($N$)($N must be $>=2)$

Followed by N dollar amounts, one on each line. ALL ARE POSITIVE INTS.

You will read that into a vector of ints of size N$.$

$3)$ After that, you will go into an infinite loop:

$3\mathrm{.}0)$ Prompt the user with: "Please enter a briefcase to open:

$"$;

$3\mathrm{.}1)$ The user will input a briefcase to open $($an integer which will range

from $0$ to N$-1)$

$3\mathrm{.}2)$ Print "That briefcase held X dollars"

$3\mathrm{.}3)$ You will then calculate the average value left in the cases.

Use INTEGER DIVISION. $($I$.$e$.$ if the cases hold $1,2,3,4,$ the average is $2.)$

$3\mathrm{.}4)$ Output the average to the user: "I will offer you X dollars to walk

away.

$"$

The loop will terminate if the user ever types $-1($indicating that a

deal is made$)$ or if there is only one briefcase left.

In both cases, print to the screen how much money they won. This will either

be the last offer $($if they took the deal$)$ or the money in the last briefcase.

It will look like this: "You won X dollars!

$"$

If an error occurs, print out "You dun goofed.

$"$ and quit.

Possible error cases you have to handle:

$1)$ If you are told to open a file that doesn't exist

$2)$ An error reading from the file like if it has letters, or ends before N

dollar amounts are read.

$2)$ The user trying to open the same briefcase twice

$3)$ The user trying to open a negative briefcase $($other than $-1)$ or a briefcase

higher than N$-1.$

$4)$ If there are less than $2$ briefcases to begin with.