Java Coding Only.

Create a currency convertor program. It will store conversion rates between a currency and the US$ for a month. The program flow is as follows:

$($Part $1)$Get user input for the historical data.

$$ Historical data will be the currency, day of month $(1-31)$ and conversion rate. Keep getting input until a null or space is entered for the currency.

$$ Assume $3$ currencies max will be entered.

$$ Store data in a $2-$dimensional array. I recommend creating a $33($rows$)$ by $5($columns$)$ matrix. Rows are day of month, columns are currency. Each cell will store the rate that was input for that Currency$/$Day of Month pair.

$$ Once $3$ unique currencies are entered, do not accept any more unique currencies.

$($Part $2)$ Get user input to lookup rates

$$ User will input a currency, day of month and an amount.

$$ You will check if a rate exists for that currency & day. If it does you will multiply the amount by

the rate and output the US$ equivalent. If the currency$/$date pair doesn't exist or there's no rate

for it$,$ output "Data Not Available"

$$ Keep requesting input until user enters null or space for currency and then terminate the

program

Example program output:

Enter Historical Data $($Currency$,$ Day of Month, Rate$)$: EUR, $1,1\mathrm{.}11$

Enter Historical Data $($Currency$,$ Day of Month, Rate$)$: EUR, $2,1\mathrm{.}10$

Enter Historical Data $($Currency$,$ Day of Month, Rate$)$: JPY$,1,\mathrm{.}0092$

$.....$

Enter Historical Data $($Currency$,$ Day of Month, Rate$)$: GBP$,31,1\mathrm{.}24$

Enter Historical Data $($Currency$,$ Day of Month, Rate$)$: $[$user enters null$]$

Enter Conversion Lookup$($Currency$,$ Day of Month, Amount$)$: EUR, $2,1000\mathrm{.}00$

$1000\mathrm{.}00$ EUR $=1110\mathrm{.}00$ US$

Enter Conversion Lookup$($Currency$,$ Day of Month, Amount$)$: GBP$,7,2000\mathrm{.}00$

Data Not Available

Enter Conversion Lookup$($Currency$,$ Day of Month, Amount$)$: GBP$,5,2000\mathrm{.}00$

$2000\mathrm{.}00$ GBP $=2500\mathrm{.}00$ US$

Enter Conversion Lookup$($Currency$,$ Day of Month, Amount$)$: $[$user enters null$]$

program terminates

You can assume that days will be $1-31$ but currencies and rates are dependent on user input. Do not

"hard code" the data I have shown here. It's just to help you design your program.

PseudoCode Programming Tips $$ Currency Convertor Project

$1.$ Load Historical Data

$$ Define a $2$ dimensional array named RateMatrix

$$ double RateMatrix$[][]=$new double$[32][4]$;

$$ You will store the days of month and rates in the $2$ dimensional array

$$ Columns

$0=$ Day of the month

$1=$ currency #$1$

$2=$ currency #$2$

$3=$ currency #$3$

$$ Rows

$$ There$$s $31$ that$$s the most days per month you can have

$$ Define a single dimension array named ccyMap

$$ String ccyMap$[]=$ new String $[3]$

$$ You will store each currency string in here, up to $3.$ You use this array to map to

the correct column in RateMatrix.

$$ ccyMap$[0]$ will be the currency that is column $1$ in Rate Matrix.

$$ ccyMap$[1]$ will be the currency that is column $2$ in Rate Matrix.

$$ ccyMap$[2]$ will be the currency that is column $3$ in Rate Matrix.

$$

Pseudo Code

Get inputStr $($Currency$,$ Day of Month, Rate$)$ from user

While $($input is not null$)$

Split inputStr into inputAra

ccy $=$ inputAra$[0]$

dayOfMonth $=$ convert inputAra$[1]$ to double

rate $=$ convert inputAra$[2]$ to double

if $($ccy is already in ccyMap$)$

get position in ccyMap

else

if number of currencies $>3$

error message $$Too May Currencies$$

break

else

add ccy to ccyMap

get position in ccyMap

end if

end if

$//$Find day of month in RateMatix

row $=0$

dayFound $=$ false

While $($RateMatrix$[$row$,0]!=$ dayOfMonth && $!$dayFound

If RateMatrix$[$row$,0]!=$ dayOfMonth

row$++$

else

dayFound $=$ true

end if

end while

col $=$ position in ccyMap

RateMatrix$[$row$,$col$]=$ rate

End While

$2.$ Get User Lookup Data

$$ Ask user to input lookup Currency, Day of Month & Amount. Exit loop when currency is

null.

$$ Check for valid input

$$ Day is between $1$ and $31$

$$ Currency is found in ccyMap

$$ If invalid data is entered

$$ Display error message

$$ Continue loop

$$ Determine row$/$column for this Currency$/$Date Pair

$$ Get value in cell of RateMatrix$($row$,$column$)$

$$ If cell RateMatrix$($row$,$column$)$ is not empty

$$ Multiply rate by amount and display conversion amount

$$ Else

$$ Display $$Data not Available$$

Program Output:

Enter $($Currency$,$ Day of Month, Rate$)$: EUR, $1,1\mathrm{.}10$

Enter $($Currency$,$ Day of Month, Rate$)$: EUR, $2,1\mathrm{.}14$

Enter $($Currency$,$ Day of Month, Rate$)$: GBP$,9,1\mathrm{.}25$

Enter $($Currency$,$ Day of Month, Rate$)$: JPY$,3,\mathrm{.}0078$

Enter $($Currency$,$ Day of Month, Rate$)$: CHF$,1,1\mathrm{.}56$

$3$ Currencies max. Please try again.

Enter $($Currency$,$ Day of Month, Rate$)$: EUR, $5,1\mathrm{.}11$

Enter $($Currency$,$ Day of Month, Rate$)$: EUR, $41,1\mathrm{.}10$

Day of month must be between $1$ & $31.$ Please try again.

Enter $($Currency$,$ Day of Month, Rate$)$: GBP$,3,1\mathrm{.}21$

Enter $($Currency$,$ Day of Month, Rate$)$: JPY$,5,\mathrm{.}0080$

Enter $($Currency$,$ Day of Month, Rate$)$: $[$null$]$

Enter Lookup $($Currency$,$ Day of Month, Amount$)$: EUR, $5,1000\mathrm{.}00$

EUR $1000\mathrm{.}00=$ USD $1100\mathrm{.}00$

Enter Lookup $($Currency$,$ Day of Month, Amount$)$: EUR, $6,1000$

Data Not Available

Enter Lookup $($Currency$,$ Day of Month, Amount$)$: CHF$,6,2000\mathrm{.}00$

Currency Not Available

Enter Lookup $($Currency$,$ Day of Month, Amount$)$: GBP$,9,2000\mathrm{.}00$