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Add comments to UE4

This commit is contained in:
Ivaylo Ivanov 2021-11-11 17:36:17 +01:00
parent 63231822c5
commit a8e05a319e
1 changed files with 20 additions and 0 deletions
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20
code/Angabe4.lhs
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@ -209,6 +209,8 @@ Aufgabe A.1
> waup (g, v) = eval_payment_sum $ eval_payment_date (g, v)
Evaluate payment date: determine the type of the payment and calculate the correct date with the correct attribute
> eval_payment_date :: Kassabucheintrag -> Kassabucheintrag
> eval_payment_date (g, v)
> | (is_payment v) && (is_date_valid (zahlung_vom v)) =
@ -225,10 +227,13 @@ Aufgabe A.1
> z = Zahlung (brutto v) (skonto v) (correct_date (zahlung_vom v))
> gs = Gutschrift (gutschriftsbetrag v) (correct_date (gutschrift_vom v))
Simple datatype conversion
> eval_payment_sum :: Kassabucheintrag -> AP_Kassabucheintrag
> eval_payment_sum (g, v) = (g, correct_sum v)
Calculate the correct date
> correct_date :: Datum -> Datum
> correct_date d
> | monat d == Feb =
@ -246,6 +251,8 @@ Aufgabe A.1
> fm = D (int_to_day 1) Mar y
> nm = D (int_to_day 1) (int_to_month ((month_to_int (monat d)) + 1)) y
Calculate the sum by reducing the "tax" from the brutto sum
> correct_sum :: Geschaeftsvorfall -> AP_Geschaeftsvorfall
> correct_sum g
> | is_credit g = P_Gutschrift (gutschriftsbetrag g) (gutschrift_vom g)
@ -276,6 +283,8 @@ Nur Werte zwischen 0 und 99 fuer cent!
> = KKB [(P_Geschaeftspartner,K_Geschaeftsvorfall)]
> deriving (Eq,Show)
Declare operators for easier calculations
> instance Num EuroCent where
> (+) s s' = (add_ec s s')
> (-) s s' = (diff_ec s s')
@ -300,6 +309,7 @@ Nur Werte zwischen 0 und 99 fuer cent!
> konsolidiere :: Kassabuch -> KonsolidiertesKassabuch
> konsolidiere k = consolidate_cash_book k []
Consolidate each payment and add it to the registry book
> consolidate_cash_book :: Kassabuch -> [(P_Geschaeftspartner,K_Geschaeftsvorfall)] -> KonsolidiertesKassabuch
> consolidate_cash_book (KB (x:xs)) res
@ -312,6 +322,8 @@ Nur Werte zwischen 0 und 99 fuer cent!
> consolidate_payment :: AP_Kassabucheintrag -> (P_Geschaeftspartner,K_Geschaeftsvorfall)
> consolidate_payment (g, v) = (g, consolidate_payment_sum v)
Split the total sum in euros and cents using the rest and result of division by 100
> consolidate_payment_sum :: AP_Geschaeftsvorfall -> K_Geschaeftsvorfall
> consolidate_payment_sum g
> | is_p_credit g =
@ -343,6 +355,8 @@ Aufgabe A.3
> saldo :: P_Geschaeftspartner -> KonsolidiertesKassabuch -> Saldo
> saldo p k = get_balance $ get_partner_cashflow p k []
Get total balance of the specified cashbook
> get_balance :: KonsolidiertesKassabuch -> Saldo
> get_balance k
> | payments == 0 && credit == 0 = Keine_Geschaeftsbeziehung
@ -354,6 +368,8 @@ Aufgabe A.3
> payments = calculate_partner_payments k init
> credit = calculate_partner_credit k init
Extract partner cashflow from cashbook
> get_partner_cashflow :: P_Geschaeftspartner -> KonsolidiertesKassabuch -> [(P_Geschaeftspartner,K_Geschaeftsvorfall)] -> KonsolidiertesKassabuch
> get_partner_cashflow p (KKB(x:xs)) res
> | length x /= 0 && null xs =
@ -364,6 +380,8 @@ Aufgabe A.3
> where
> (g, v) = x
Calculate the payments of all partners
> calculate_partner_payments :: KonsolidiertesKassabuch -> EuroCent -> EuroCent
> calculate_partner_payments (KKB []) _ = (EC 0 0)
> calculate_partner_payments (KKB(x:xs)) res
@ -375,6 +393,8 @@ Aufgabe A.3
> where
> (g,v) = x
Calculate the cerdits of all partners
> calculate_partner_credit :: KonsolidiertesKassabuch -> EuroCent -> EuroCent
> calculate_partner_credit (KKB []) _ = (EC 0 0)
> calculate_partner_credit (KKB(x:xs)) res