#include

#include

#include

#include

using namespace std;

$//$ Interface for SafeArray class

$//--------------------------------$

const int SIZE $=20$;

class SafeArray

$\{$

public:

SafeArray$()$;

SafeArray$($const SafeArray & copy$)$;

~SafeArray$()$;

bool GetElement$($const int i$,$ float & Value$)$ const;

bool SetElement$($const int i$,$ float Value$)$;

bool ReadArray$($const string Filename$)$;

bool WriteArray$($const string Filename$)$ const;

void Print$()$ const;

private:

float Array$[$SIZE$]$;

$\}$;

$//$ Implementation for SafeArray class

$//-----------------------------------$

SafeArray::SafeArray$()$

$\{$

cout $<<$ "construct

$"$;

for $($int i $=0$; i $<$ SIZE; i$++)$

Array$[$i$]=42$;

$\}$

SafeArray::SafeArray$($const SafeArray & copy$)$

$\{$

cout $<<$ "copy

$"$;

for $($int i $=0$; i $<$ SIZE; i$++)$

Array$[$i$]=$ copy.Array$[$i$]$;

$\}$

SafeArray::~SafeArray$()$

$\{$

cout $<<$ "destruct

$"$;

$\}$

bool SafeArray::GetElement$($const int i$,$ float & Value$)$ const

$\{$

bool Success $=$ false;

if $(($i $>=0)$ && $($i $<$ SIZE$))$

$\{$

Success $=$ true;

Value $=$ Array$[$i$]$;

$\}$

return Success;

$\}$

bool SafeArray::SetElement$($const int i$,$ float Value$)$

$\{$

bool Success $=$ false;

if $(($i $>=0)$ && $($i $<$ SIZE$))$

$\{$

Success $=$ true;

Array$[$i$]=$ Value;

$\}$

return Success;

$\}$

bool SafeArray::ReadArray$($const string Filename$)$

$\{$

ifstream infile;

infile.open$($Filename$.$c$\_$str$())$;

if $($infile$.$fail$())$

return false;

for $($int i $=0$; i $<$ SIZE; i$++)$

infile $>>$ Array$[$i$]$;

infile.close$()$;

return true;

$\}$

bool SafeArray::WriteArray$($const string Filename$)$ const

$\{$

ofstream outfile;

outfile.open$($Filename$.$c$\_$str$())$;

if $($outfile$.$fail$())$

return false;

for $($int i $=0$; i $<$ SIZE; i$++)$

outfile $<<$ Array$[$i$]<<$ endl;

outfile.close$()$;

return true;

$\}$

void SafeArray::Print$()$ const

$\{$

for $($int i $=0$; i $<$ SIZE; i$++)$

cout $<<$ "Array$["<<$ i $<<"]="<<$ Array$[$i$]<<$ endl;

$\}$

$//$ Program to demonstrate SafeArray class

$//---------------------------------------$

int main$()$

$\{$

$//$ Step$2-$ creating two SafeArray objects data$1,$ data$2$;

SafeArray data$1$;

SafeArray data$2$;

$//$ Step $4-$ using the "GetElement" and "SetElement" methods.

for $($int i $=-5$; i $<25$; i$++)//$ Step$5-$ for loop is setting values from $-5$ to $24$ but our setElement is taking care

$\{$

bool check $=$ data$1.$SetElement$($i$,$ i $*0\mathrm{.}1)$;

if$($check$)$

cout $<<$ "set $"<<$ i $<<""<<$ i $*0\mathrm{.}1<<$ endl;

$\}$

$//$Step$3-$ calling print$()$ function on data$1$ object

data$1.$Print$()$;

$//$Step$7-$ calling getElement and printing the values

for $($int i $=-5$; i $<25$; i$++)//$

$\{$

float value$=0$;

bool check $=$ data$1.$GetElement$($i$,$ value$)$;

if$($check$)$

cout $<<$ "get $"<<$ i $<<""<<$ value $<<$ endl;

$\}$

$//$ Step$8-$ created a file data$2.$in

$//$Step $9-$calling ReadArray and WriteArray i$.$e reading values from data$2.$in and output the values to data$2.$out and output screen.

data$2.$ReadArray$("$data$2.$in$")$;$//$reading values from data$2.$in

data$2.$Print$()$;$//$printing those values to output screen

data$2.$WriteArray$("$data$2.$out"$)$;$//$printing those values to data$2.$out

return $0$;

$\}$