currencies.txt is provided by course

Algorithm solution to the problem:

Prompt the user to enter source currency and store the input to variable sCurrency

Prompt the user to enter target currency and store the input to variable tCurrency

Prompt the user to enter original amount and store the input to variable a

Convert string variable a to float and store it to variable amount

Open File "currencies.txt$"$ for read and assign the file object $($IO channel$)$ to variable $f$

The whole content of the file object $f$ is read and stored in variable content

Close IO channel f

The items in string content is split based on separator $"n"$ and stored in a list variable

lines.

For each line in List lines

Split line into a list items

Retrieve the first item $($currency code$)$ from list items and assign to variable code

Retrieve the second item from list items and assign it to variable $q$

Convert variable $q$ to float and assign it to variable quantity

If code equals to sCurrency

Assign quantity to variable sValue

If code equals to tCurrency

Assign quantity to variable tValue

Calculate amount $*$ tValue$/$sValue and assign it to variable result

Display the message with original currency and amount that equals target currency and

amount $($result$).$