Program $8\mathrm{.}2$

#include

#include

#include $//$ needed for exit$()$

using namespace std;

int main$()$

$\{$

what does this code mean

ifstream inFile;

ofstream outFile;

inFile.open$("$prices$.$dat"$)$; $//$ attempt to open the file for input

char response;

if $(!$inFile.fail$())//$ if it doesn't fail, the file exists

$\{$

cout $$ "A file by the name prices.dat exists.

$"$

Do you want to continue and overwrite it

$"$

with the new data $($y or n$)$: $"$;

cin $>>$ response;

if $($tolower$($response$)==\text{'}$n$\text{'})$

$\{$

cout $$ "The existing file will not be overwritten." $$ endl;

exit$(1)$; $//$terminate program execution

$\}$

$\}$

outFile.open$("$prices$.$dat"$)$; $//$ now open the file for writing

if $($inFile$.$fail$())//$ check for a successful open

$\{$

cout

The file was not successfully opened"

$$ endl;

exit$(1)$;

$\}$

cout $$ "The file has been successfully opened for output."

$$ endl;

$//$ statements to write to the file would be placed here

return $0$;

$\}$