- Read CSV File Practice (2024.05.04)
- Depreciation Calculator 2.1 (2024.04.29)
- Depreciation Calculator 2 (2024.04.22)
- Depreciation Calculator (2024.04.20)
- Compound Interest Calculator 2 (2023.12.16)
- Compound Interest Calculator (2023.12.07)
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Features
- The length of the data is allowed to vary, but the width is fixed at two columns.
- Output spacing and the position of the header row are specified as constants.
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Code, Example Data and Output
Code : ReadCSV.f95
PROGRAM ReadCSVFile IMPLICIT NONE ! Constants INTEGER, PARAMETER :: MaxRows = 1000, MaxCols = 10 ! Maximum number of rows and columns INTEGER, PARAMETER :: MaxColumnLength = 16 ! Maximum length of each column INTEGER, PARAMETER :: HeaderRow = 1 ! Row number containing column headers ! Variables CHARACTER(MaxColumnLength) :: DataArray(MaxRows, 2) ! Array to store data CHARACTER(80) :: FileName ! File name INTEGER :: NumRows, i, FileUnit ! Number of rows and file unit CHARACTER(80) :: Line ! Line read from the file ! Get the file name FileName = 'GirlGroups.csv' ! Open the data file OPEN(UNIT=FileUnit, FILE=FileName, STATUS='OLD', ACTION='READ') ! Initialize the number of rows NumRows = 0 ! Read the data from the file DO READ(FileUnit, '(A)', END=999) Line NumRows = NumRows + 1 ! Split the line into columns CALL SplitLine(Line, DataArray(NumRows, 1), DataArray(NumRows, 2)) END DO 999 CONTINUE ! Close the data file CLOSE(UNIT=FileUnit) ! Print the data array DO i = 1, NumRows WRITE(*, '(A, A)') DataArray(i, 1), DataArray(i, 2) ! Print the line separator IF (i == HeaderRow) THEN WRITE(*, '(A)') REPEAT('-', MaxColumnLength*2) END IF END DO CONTAINS ! Subroutine to split a line into two columns SUBROUTINE SplitLine(Line, Column1, Column2) …… END PROGRAM ReadCSVFile
! Subroutine to split a line into two columns SUBROUTINE SplitLine(Line, Column1, Column2) IMPLICIT NONE CHARACTER(80), INTENT(IN) :: Line ! Input line CHARACTER(MaxColumnLength) :: Column1, Column2 ! Output columns CHARACTER(80) :: TempLine ! Temporary line storage INTEGER :: Start, End ! Start and end positions TempLine = TRIM(Line) Start = 1 ! Read the first column until a comma is encountered DO WHILE (Start <= LEN(TempLine) .AND. TempLine(Start:Start) /= ',') Start = Start + 1 END DO End = MIN(Start+MaxColumnLength-1, LEN(TempLine)) Column1 = TempLine(1:Start-1) ! Read the second column from the comma to the end of the line Start = Start + 1 Column2 = TempLine(Start:LEN(TempLine)) END SUBROUTINE SplitLine
Example Data : GirlGroups.csv
Group,Member aespa,Karina aespa,Winter aespa,Giselle aespa,Ningning BLACKPINK,Jisoo BLACKPINK,Jennie BLACKPINK,Rosé BLACKPINK,LisaOutput
Group Member -------------------------------- aespa Karina aespa Winter aespa Giselle aespa Ningning BLACKPINK Jisoo BLACKPINK Jennie BLACKPINK Rosé BLACKPINK Lisa
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Refactoring : Divide into 7 subroutines
SetTableFormats()PrintProgramInfo()PrintDepreciationMethodDetails()GetUserInput()CalculateDefaultDepreciationRate()PrintDepreciationTableHeader()PrintDepreciationTableRow()
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Code and Output
Code : DepreciationCalculator2.1.f95 (Only mainly updated parts)
MODULE GlobalFormats ! Declare global variables for formatting IMPLICIT NONE CHARACTER(LEN=19) :: TableColumnNameFormat CHARACTER(LEN=25) :: TableRowContentFormat CHARACTER(LEN=22) :: TableTitleFormatWithRate CHARACTER(LEN=10) :: TableTitleFormatWithoutRate END MODULE GlobalFormatsPROGRAM DepreciationCalculator2 USE GlobalFormats IMPLICIT NONE DOUBLE PRECISION :: InitialCost, SalvageValue, UsefulLife, DepreciationRate INTEGER :: Year ! Set column and row formatting CALL SetTableFormats(TableColumnNameFormat, TableRowContentFormat, & TableTitleFormatWithRate, TableTitleFormatWithoutRate) ! Display program information CALL PrintProgramInfo() ! Notification of specific details CALL PrintDepreciationMethodDetails() ! Get user input CALL GetUserInput(InitialCost, SalvageValue, UsefulLife, DepreciationRate) ! Set default value of the depreciation rate for DB method CALL CalculateDefaultDepreciationRate(DepreciationRate, UsefulLife) ! Call the custom functions to calculate depreciation …… CONTAINS SUBROUTINE SetTableFormats(TableColumnNameFormat, TableRowContentFormat, & TableTitleFormatWithRate, TableTitleFormatWithoutRate) …… SUBROUTINE PrintProgramInfo() …… SUBROUTINE PrintDepreciationMethodDetails() …… SUBROUTINE GetUserInput(InitialCost, SalvageValue, UsefulLife, DepreciationRate) …… SUBROUTINE CalculateDefaultDepreciationRate(DepreciationRate, UsefulLife) …… SUBROUTINE PrintDepreciationTableHeader(MethodName, DepreciationRate) …… SUBROUTINE PrintDepreciationTableRow(Year, DepreciationExpense, & AccumulatedDepreciation, BookValue) …… SUBROUTINE CalculateStraightLine(InitialCost, SalvageValue, UsefulLife) …… SUBROUTINE CalculateDecliningBalance(InitialCost, SalvageValue, & UsefulLife, DepreciationRate) …… SUBROUTINE CalculateDoubleDecliningBalance(InitialCost, SalvageValue, UsefulLife) …… SUBROUTINE CalculateSYD(InitialCost, SalvageValue, UsefulLife) …… END PROGRAM DepreciationCalculator2
SUBROUTINE SetTableFormats(TableColumnNameFormat, TableRowContentFormat, & TableTitleFormatWithRate, TableTitleFormatWithoutRate) IMPLICIT NONE CHARACTER(*), INTENT(OUT) :: TableColumnNameFormat, TableRowContentFormat, & TableTitleFormatWithRate, TableTitleFormatWithoutRate ! Set column and row formatting TableColumnNameFormat = "(A6, A16, A16, A16)" TableRowContentFormat = "(I6, F16.2, F16.2, F16.2)" TableTitleFormatWithRate = "(A, A, A, A, F5.2, A/)" TableTitleFormatWithoutRate = "(A, A, A/)" END SUBROUTINE SetTableFormats
SUBROUTINE PrintProgramInfo() IMPLICIT NONE ! Display program information WRITE(*, '(A)', ADVANCE='NO') "Depreciation Calculator Ver.2.1" WRITE(*, '(A/)') " (2024.04.29)" END SUBROUTINE PrintProgramInfo
SUBROUTINE PrintDepreciationMethodDetails() ! Print the notification about declining balance method and salvage value WRITE(*, '(A)') "※ In declining balance method and double declining balance depreciation, " WRITE(*, '(A/)') " the salvage value is not recognized in the calculation of the depreciation base." END SUBROUTINE PrintDepreciationMethodDetails
SUBROUTINE GetUserInput(InitialCost, SalvageValue, UsefulLife, DepreciationRate) IMPLICIT NONE DOUBLE PRECISION, INTENT(OUT) :: InitialCost, SalvageValue, UsefulLife, DepreciationRate ! Get user input WRITE(*, '(A)', ADVANCE='NO') " Enter the initial cost of the asset : " READ *, InitialCost WRITE(*, '(A)') " Enter the salvage value of the asset" WRITE(*, '(A)', ADVANCE='NO') " (or the memorandum value) : " READ *, SalvageValue WRITE(*, '(A)', ADVANCE='NO') " Enter the useful life of the asset (in years) : " READ *, UsefulLife WRITE(*, '(A)') " Enter the depreciation rate(%)" WRITE(*, '(A)', ADVANCE='NO') " (Default: 2 / useful life, ≒ DDB) : " READ *, DepreciationRate WRITE(*, '(A)') "" END SUBROUTINE GetUserInput
SUBROUTINE CalculateDefaultDepreciationRate(DepreciationRate, UsefulLife) IMPLICIT NONE DOUBLE PRECISION, INTENT(INOUT) :: DepreciationRate DOUBLE PRECISION, INTENT(IN) :: UsefulLife IF (DepreciationRate == 0.0) THEN DepreciationRate = (2 / UsefulLife) * 100 END IF END SUBROUTINE CalculateDefaultDepreciationRate
SUBROUTINE PrintDepreciationTableHeader(MethodName, DepreciationRate) IMPLICIT NONE CHARACTER(*), INTENT(IN) :: MethodName DOUBLE PRECISION, OPTIONAL, INTENT(IN) :: DepreciationRate ! Print the header for the specified depreciation method IF (PRESENT(DepreciationRate)) THEN WRITE(*, TableTitleFormatWithRate) "<", MethodName, ">", & " (Rate: ", DepreciationRate, "%)" ELSE WRITE(*, TableTitleFormatWithoutRate) "<", MethodName, ">" END IF WRITE(*, TableColumnNameFormat) "Year", "Depreciation", "Accumulated", "Book" WRITE(*, TableColumnNameFormat) "", "Expense", "Depreciation", "Value" END SUBROUTINE PrintDepreciationTableHeader
SUBROUTINE PrintDepreciationTableRow(Year, DepreciationExpense, & AccumulatedDepreciation, BookValue) IMPLICIT NONE INTEGER, INTENT(IN) :: Year DOUBLE PRECISION, INTENT(IN) :: DepreciationExpense, AccumulatedDepreciation, BookValue ! Print the row content for each year WRITE(*, TableRowContentFormat) Year, DepreciationExpense, & AccumulatedDepreciation, BookValue END SUBROUTINE PrintDepreciationTableRow
SUBROUTINE CalculateStraightLine(InitialCost, SalvageValue, UsefulLife) …… ! Calculate and print depreciation for each year CALL PrintDepreciationTableHeader("Straight-Line Method") DO Year = 1, INT(UsefulLife) …… CALL PrintDepreciationTableRow(Year, DepreciationExpense, & AccumulatedDepreciation, BookValue) END DO …… END SUBROUTINE CalculateStraightLine
SUBROUTINE CalculateDecliningBalance(InitialCost, SalvageValue, & UsefulLife, DepreciationRate) …… ! Calculate and print depreciation for each year CALL PrintDepreciationTableHeader("Declining Balance Method", DepreciationRate) DO Year = 1, INT(UsefulLife) …… CALL PrintDepreciationTableRow(Year, DepreciationExpense, & AccumulatedDepreciation, BookValue) …… END DO …… END SUBROUTINE CalculateDecliningBalance
SUBROUTINE CalculateDoubleDecliningBalance(InitialCost, SalvageValue, UsefulLife) …… ! Calculate and print depreciation for each year CALL PrintDepreciationTableHeader("Double Declining Balance Method", DepreciationRate) DO Year = 1, INT(UsefulLife) …… CALL PrintDepreciationTableRow(Year, DepreciationExpense, & AccumulatedDepreciation, BookValue) …… END DO …… END SUBROUTINE CalculateDoubleDecliningBalance
SUBROUTINE CalculateSYD(InitialCost, SalvageValue, UsefulLife) …… ! Calculate and print depreciation for each year CALL PrintDepreciationTableHeader("Sum-of-the-Years' Digits Method") DO Year = 1, INT(UsefulLife) …… CALL PrintDepreciationTableRow(Year, DepreciationExpense, & AccumulatedDepreciation, BookValue) END DO …… END SUBROUTINE CalculateSYD
Output
Depreciation Calculator Ver.2.1 (2024.04.29) ※ In declining balance method and double declining balance depreciation, the salvage value is not recognized in the calculation of the depreciation base. Enter the initial cost of the asset : 11000 Enter the salvage value of the asset (or the memorandum value) : 1000 Enter the useful life of the asset (in years) : 5 Enter the depreciation rate(%) (Default: 2 / useful life, ≒ DDB) : 50 <Straight-Line Method> Year Depreciation Accumulated Book Expense Depreciation Value 1 2000.00 2000.00 9000.00 2 2000.00 4000.00 7000.00 3 2000.00 6000.00 5000.00 4 2000.00 8000.00 3000.00 5 2000.00 10000.00 1000.00 ……
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Add various methods of depreciation
- Declining Balance Method
- Double Declining Balance Method
- Sum-of-the-Years' Digits Method
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Future Improvements
Calculation of depreciation adjustment related with tax accountingConsideration of memorandum value
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Code and Output
Code : DepreciationCalculator2.f95
MODULE GlobalFormats IMPLICIT NONE ! Declare global variables for formatting CHARACTER(LEN=19) :: ColumnNameFormat CHARACTER(LEN=25) :: RowContentFormat END MODULE GlobalFormatsPROGRAM DepreciationCalculator2 USE GlobalFormats IMPLICIT NONE DOUBLE PRECISION :: InitialCost, SalvageValue, UsefulLife DOUBLE PRECISION :: DepreciationRate INTEGER :: Year ! Set column and row formatting ColumnNameFormat = "(A6, A16, A16, A16)" RowContentFormat = "(I6, F16.2, F16.2, F16.2)" ! Display program information WRITE(*, '(A)', ADVANCE='NO') "Depreciation Calculator Ver.2" WRITE(*, '(A/)') " (2024.04.22)" ! Get user input WRITE(*, '(A)', ADVANCE='NO') " Enter the initial cost of the asset : "; READ *, InitialCost WRITE(*, '(A)', ADVANCE='NO') " Enter the salvage value of the asset : "; READ *, SalvageValue WRITE(*, '(A)', ADVANCE='NO') " Enter the useful life of the asset (in years) : "; READ *, UsefulLife WRITE(*, '(A)') " Enter the depreciation rate(%)" WRITE(*, '(A)', ADVANCE='NO') " (Default: 2 / useful life, ≒ DDB) : "; READ *, DepreciationRate ! Notification of specific details WRITE(*, '(/A)') "※ In declining balance method and double declining balance depreciation, " WRITE(*, '(A)') " the salvage value is not recognized in the calculation of the depreciation base." WRITE(*, '(/)') ! Set default value of the depreciation rate for DB method IF (DepreciationRate == 0.0) THEN DepreciationRate = (2 / UsefulLife) * 100 END IF ! Call the custom functions to calculate depreciation CALL CalculateStraightLine(InitialCost, SalvageValue, UsefulLife) CALL CalculateDecliningBalance(InitialCost, SalvageValue, UsefulLife, DepreciationRate) CALL CalculateDoubleDecliningBalance(InitialCost, SalvageValue, UsefulLife) CALL CalculateSYD(InitialCost, SalvageValue, UsefulLife) CONTAINS SUBROUTINE CalculateStraightLine(InitialCost, SalvageValue, UsefulLife) …… SUBROUTINE CalculateDecliningBalance(InitialCost, SalvageValue, UsefulLife, DepreciationRate) …… SUBROUTINE CalculateDoubleDecliningBalance(InitialCost, SalvageValue, UsefulLife) …… SUBROUTINE CalculateSYD(InitialCost, SalvageValue, UsefulLife) …… END PROGRAM DepreciationCalculator2
SUBROUTINE CalculateStraightLine(InitialCost, SalvageValue, UsefulLife) IMPLICIT NONE DOUBLE PRECISION, INTENT(IN) :: InitialCost, SalvageValue, UsefulLife DOUBLE PRECISION :: DepreciationExpense, AccumulatedDepreciation, BookValue ! Initialize accumulatedDepreciation and bookValue AccumulatedDepreciation = 0.0 BookValue = InitialCost ! Print header WRITE(*, '(A, /)') "<Straight-Line Method>" WRITE(*, ColumnNameFormat) "Year", "Depreciation", "Accumulated", "Book" WRITE(*, ColumnNameFormat) "", "Expense", "Depreciation", "Value" ! Calculate and print depreciation for each year DO Year = 1, INT(UsefulLife) DepreciationExpense = (InitialCost - SalvageValue) / UsefulLife AccumulatedDepreciation = AccumulatedDepreciation + DepreciationExpense BookValue = BookValue - DepreciationExpense WRITE(*, RowContentFormat) Year, DepreciationExpense, AccumulatedDepreciation, BookValue END DO WRITE(*, '(A)') "" END SUBROUTINE CalculateStraightLine
SUBROUTINE CalculateDecliningBalance(InitialCost, SalvageValue, UsefulLife, DepreciationRate) IMPLICIT NONE DOUBLE PRECISION, INTENT(IN) :: InitialCost, SalvageValue, UsefulLife, DepreciationRate DOUBLE PRECISION :: DepreciationExpense, AccumulatedDepreciation, BookValue ! Initialize accumulatedDepreciation and bookValue AccumulatedDepreciation = 0.0 BookValue = InitialCost ! Print header WRITE(*, '(A, F5.2, A/)') "<Declining Balance Method> (Rate: ", DepreciationRate, "%)" WRITE(*, ColumnNameFormat) "Year", "Depreciation", "Accumulated", "Book" WRITE(*, ColumnNameFormat) "", "Expense", "Depreciation", "Value" ! Calculate and print depreciation for each year DO Year = 1, INT(UsefulLife) IF (BookValue * (1 - DepreciationRate / 100) >= SalvageValue) THEN DepreciationExpense = BookValue * DepreciationRate / 100 AccumulatedDepreciation = AccumulatedDepreciation + DepreciationExpense BookValue = BookValue - DepreciationExpense ELSE BookValue = SalvageValue DepreciationExpense = (InitialCost - SalvageValue) - AccumulatedDepreciation AccumulatedDepreciation = InitialCost - SalvageValue END IF WRITE(*, RowContentFormat) Year, DepreciationExpense, AccumulatedDepreciation, BookValue IF (BookValue <= SalvageValue) THEN EXIT END IF END DO WRITE(*, '(A)') "" END SUBROUTINE CalculateDecliningBalance
SUBROUTINE CalculateDoubleDecliningBalance(InitialCost, SalvageValue, UsefulLife) IMPLICIT NONE DOUBLE PRECISION, INTENT(IN) :: InitialCost, SalvageValue, UsefulLife DOUBLE PRECISION :: DepreciationRate, DepreciationExpense, AccumulatedDepreciation, BookValue ! Initialize accumulatedDepreciation and bookValue AccumulatedDepreciation = 0.0 BookValue = InitialCost DepreciationRate = (2 / UsefulLife) * 100 ! Print header WRITE(*, '(A, F5.2, A/)') "<Double Declining Balance Method> (Rate: ", DepreciationRate, "%)" WRITE(*, ColumnNameFormat) "Year", "Depreciation", "Accumulated", "Book" WRITE(*, ColumnNameFormat) "", "Expense", "Depreciation", "Value" ! Calculate and print depreciation for each year DO Year = 1, INT(UsefulLife) IF (BookValue * (1 - DepreciationRate / 100) >= SalvageValue) THEN DepreciationExpense = BookValue * DepreciationRate / 100 AccumulatedDepreciation = AccumulatedDepreciation + DepreciationExpense BookValue = BookValue - DepreciationExpense ELSE BookValue = SalvageValue DepreciationExpense = (InitialCost - SalvageValue) - AccumulatedDepreciation AccumulatedDepreciation = InitialCost - SalvageValue END IF WRITE(*, RowContentFormat) Year, DepreciationExpense, AccumulatedDepreciation, BookValue IF (BookValue <= SalvageValue) THEN EXIT END IF END DO WRITE(*, '(A)') "" END SUBROUTINE CalculateDoubleDecliningBalance
SUBROUTINE CalculateSYD(InitialCost, SalvageValue, UsefulLife) IMPLICIT NONE DOUBLE PRECISION, INTENT(IN) :: InitialCost, SalvageValue, UsefulLife DOUBLE PRECISION :: DepreciationExpense, AccumulatedDepreciation, BookValue INTEGER :: SumOfYears ! Calculate the sum of the years' digits SumOfYears = UsefulLife * (UsefulLife + 1) / 2 ! Initialize accumulatedDepreciation and bookValue AccumulatedDepreciation = 0.0 BookValue = InitialCost ! Print header WRITE(*, '(A, /)') "<Sum-of-the-Years' Digits Method>" WRITE(*, ColumnNameFormat) "Year", "Depreciation", "Accumulated", "Book" WRITE(*, ColumnNameFormat) "", "Expense", "Depreciation", "Value" ! Calculate and print depreciation for each year DO Year = 1, INT(UsefulLife) DepreciationExpense = (InitialCost - SalvageValue) * (UsefulLife - Year + 1) / SumOfYears AccumulatedDepreciation = AccumulatedDepreciation + DepreciationExpense BookValue = BookValue - DepreciationExpense WRITE(*, RowContentFormat) Year, DepreciationExpense, AccumulatedDepreciation, BookValue END DO WRITE(*, '(A)') "" END SUBROUTINE CalculateSYD
Output
Depreciation Calculator Ver.2 (2024.04.22) Enter the initial cost of the asset : 11000 Enter the salvage value of the asset : 1000 Enter the useful life of the asset (in years) : 5 Enter the depreciation rate(%) (Default: 2 / useful life, ≒ DDB) : 50 ※ In declining balance method and double declining balance depreciation, the salvage value is not recognized in the calculation of the depreciation base. <Straight-Line Method> Year Depreciation Accumulated Book Expense Depreciation Value 1 2000.00 2000.00 9000.00 2 2000.00 4000.00 7000.00 3 2000.00 6000.00 5000.00 4 2000.00 8000.00 3000.00 5 2000.00 10000.00 1000.00 <Declining Balance Method> (Rate: 50.00%) Year Depreciation Accumulated Book Expense Depreciation Value 1 5500.00 5500.00 5500.00 2 2750.00 8250.00 2750.00 3 1375.00 9625.00 1375.00 4 375.00 10000.00 1000.00 <Double Declining Balance Method> (Rate: 40.00%) Year Depreciation Accumulated Book Expense Depreciation Value 1 4400.00 4400.00 6600.00 2 2640.00 7040.00 3960.00 3 1584.00 8624.00 2376.00 4 950.40 9574.40 1425.60 5 425.60 10000.00 1000.00 <Sum-of-the-Years' Digits Method> Year Depreciation Accumulated Book Expense Depreciation Value 1 3333.33 3333.33 7666.67 2 2666.67 6000.00 5000.00 3 2000.00 8000.00 3000.00 4 1333.33 9333.33 1666.67 5 666.67 10000.00 1000.00
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Calculate depreciation only using the straight-line method
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Future Improvements
- Add various methods of depreciation
: Declining Balance Method, Accelerated Depreciation Method, Sum-of-the-Years’ Digits Method, etc. → Done
- Add various methods of depreciation
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Code and Output
Code : DepreciationCalculator.f95
PROGRAM DepreciationCalculator (All of the below code is located here) END PROGRAM DepreciationCalculator
IMPLICIT NONEDOUBLE PRECISION :: InitialCost, SalvageValue, UsefulLife DOUBLE PRECISION :: DepreciationExpense, AccumulatedDepreciation, BookValue INTEGER :: Year
! Get user input WRITE(*, '(A)', ADVANCE='NO') "Enter the initial cost of the asset : "; READ *, InitialCost WRITE(*, '(A)', ADVANCE='NO') "Enter the salvage value of the asset : "; READ *, SalvageValue WRITE(*, '(A)', ADVANCE='NO') "Enter the useful life of the asset (in years) : "; READ *, UsefulLife WRITE(*, '(A)') ""! Initialize accumulatedDepreciation and bookValue AccumulatedDepreciation = 0.0 BookValue = InitialCost! Print header WRITE(*, '(A6, A22, A26, A20)') "Year", "Depreciation Expense", "Accumulated Depreciation", "Book Value" ! Calculate and print depreciation for each year DO Year = 1, INT(UsefulLife) DepreciationExpense = (InitialCost - SalvageValue) / UsefulLife AccumulatedDepreciation = AccumulatedDepreciation + DepreciationExpense BookValue = BookValue - DepreciationExpense WRITE(*, '(I6, F22.2, F26.2, F20.2)') Year, DepreciationExpense, AccumulatedDepreciation, BookValue END DO
Output
Enter the initial cost of the asset : 11000 Enter the salvage value of the asset : 1000 Enter the useful life of the asset (in years) : 5 Year Depreciation Expense Accumulated Depreciation Book Value 1 2000.00 2000.00 9000.00 2 2000.00 4000.00 7000.00 3 2000.00 6000.00 5000.00 4 2000.00 8000.00 3000.00 5 2000.00 10000.00 1000.00
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Improvements
- Add 2 items : Total withdrawal amount, Maturity balance
- Improve the calculation method for
Pmt < 0by using a loop. - Add a test mode.
- Failed to apply conditional compilation.
- Adhere to the standard Fortran conventions (use uppercase keywords).
- Separate frequently used formats into separate strings.
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Code and Output
Code : CompoundInterestCalc.f95
PROGRAM CompoundInterestCalculator_2 (All of the below code is located here) END PROGRAM CompoundInterestCalculator_2
IMPLICIT NONELOGICAL :: IsTest REAL :: Principal, Rate, Pmt, & Deposit, Interest, CurrentValue, & TotalInterest, TotalWithdrawl, TotalAmount, MaturityBalance INTEGER :: Periods, i CHARACTER(LEN=30), PARAMETER :: Format1 = "(A,I6,A,F12.2,A,F12.2,A,F12.2)" CHARACTER(LEN= 9), PARAMETER :: Format2 = "(A,F12.2)" ! Set if test mode IsTest = .TRUE. ! #IF DEFINED(TEST) ! IsTest = .TRUE. ! #ELSE ! IsTest = .FALSE. ! #ENDIF
! Get values from user WRITE(*, "(A)", ADVANCE='NO') 'Enter the principal amount : '; READ*, Principal WRITE(*, "(A)", ADVANCE='NO') 'Enter the interest rate(%) : '; READ*, Rate WRITE(*, "(A)", ADVANCE='NO') 'Enter the number of periods : '; READ*, Periods WRITE(*, "(A)", ADVANCE='NO') 'Enter the Periodic Payment (Withdrawl < 0) : '; READ*, Pmt
! Initialize variables Deposit = Principal CurrentValue = Principal Interest = 0.0 TotalInterest = 0.0 TotalWithdrawl = 0.0
! Calculate ! Pmt : The initial deposit is assumed. IF ((Pmt >= 0) .AND. .NOT. (IsTest)) THEN Deposit = Principal + Pmt * Periods CurrentValue = Principal * (1 + Rate/100) ** Periods + & Pmt * ( ( (1 + Rate/100) ** Periods - 1) / (Rate/100) ) TotalInterest = CurrentValue - Deposit ELSE IF (IsTest) THEN WRITE(*, "(A)") "" WRITE(*, "(A)") "<Test>" END IF DO i = 1, Periods Interest = (CurrentValue + Pmt) * (Rate/100) CurrentValue = CurrentValue + Pmt + Interest TotalInterest = TotalInterest + Interest IF (Pmt >= 0) THEN Deposit = Deposit + Pmt ELSE TotalWithdrawl = TotalWithdrawl - Pmt END IF IF (IsTest) THEN ! WRITE(*, "(I6)") " i: ", i ! " i: " requires "(A)"! WRITE(*, Format1) & " i: ", i, ", Deposit: ", Deposit, ", Interest: ", Interest, ", CurrentValue : ", CurrentValue END IF END DO END IF TotalAmount = Deposit + TotalInterest MaturityBalance = TotalAmount - TotalWithdrawl
! Display the calculated results WRITE(*, "(A)") "" WRITE(*, Format2) "The deposit amount : ", Deposit WRITE(*, Format2) "The interest amount : ", TotalInterest WRITE(*, Format2) "The total amount : ", TotalAmount WRITE(*, Format2) "The early withdrawal amount : ", TotalWithdrawl WRITE(*, Format2) "The maturity balance : ", MaturityBalance
Output
Enter the principal amount : 12000 Enter the interest rate(%) : 6 Enter the number of periods : 12 Enter the Periodic Payment (Withdrawl < 0) : 0 The deposit amount : 12000.00 The interest amount : 12146.36 The total amount : 24146.36 The early withdrawal amount : 0.00 The maturity balance : 24146.36
Enter the principal amount : 0 Enter the interest rate(%) : 6 Enter the number of periods : 12 Enter the Periodic Payment (Withdrawl < 0) : 1000 The deposit amount : 12000.00 The interest amount : 5882.14 The total amount : 17882.14 The early withdrawal amount : 0.00 The maturity balance : 17882.14
Enter the principal amount : 12720 Enter the interest rate(%) : 6 Enter the number of periods : 12 Enter the Periodic Payment (Withdrawl < 0) : -720 <Test> i: 1, Deposit: 12720.00, Interest: 720.00, CurrentValue : 12720.00 i: 2, Deposit: 12720.00, Interest: 720.00, CurrentValue : 12720.00 i: 3, Deposit: 12720.00, Interest: 720.00, CurrentValue : 12720.00 i: 4, Deposit: 12720.00, Interest: 720.00, CurrentValue : 12720.00 i: 5, Deposit: 12720.00, Interest: 720.00, CurrentValue : 12720.00 i: 6, Deposit: 12720.00, Interest: 720.00, CurrentValue : 12720.00 i: 7, Deposit: 12720.00, Interest: 720.00, CurrentValue : 12720.00 i: 8, Deposit: 12720.00, Interest: 720.00, CurrentValue : 12720.00 i: 9, Deposit: 12720.00, Interest: 720.00, CurrentValue : 12720.00 i: 10, Deposit: 12720.00, Interest: 720.00, CurrentValue : 12720.00 i: 11, Deposit: 12720.00, Interest: 720.00, CurrentValue : 12720.00 i: 12, Deposit: 12720.00, Interest: 720.00, CurrentValue : 12720.00 The deposit amount : 12720.00 The interest amount : 8640.00 The total amount : 21360.00 The early withdrawal amount : 8640.00 The maturity balance : 12720.00
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My initial Fortran code to overcome coding yips(?)
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Environment : Fortran 95 supported on Replit
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Compilation and Run
- Compilation
gfortran -o main CompoundInterestCalc.f95
- Run
./main
- Compilation
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Code and Output
Code : CompoundInterestCalc.f95
program compound_interest_calculator implicit none real :: principal, rate, time, pmt, deposit, future_value ! Get principal amount from user write(*, "(A)", advance='no') 'Enter the principal amount : ' read*, principal ! Get interest rate from user write(*, "(A)", advance='no') 'Enter the interest rate(%) : ' read*, rate ! Get number of periods from user write(*, "(A)", advance='no') 'Enter the number of periods : ' read*, time ! Get periodic payment from user write(*, "(A)", advance='no') 'Enter the Periodic Payment : ' read*, pmt ! Calculate deposit and future value deposit = principal + pmt * time future_value = principal * (1 + rate/100) ** time + pmt * ( ( (1 + rate/100) ** time - 1) / (rate/100) ) ! Display the calculated results write(*, "(A)") " " write(*, "(A,F12.2)") "The deposit amount : ", deposit write(*, "(A,F12.2)") "The interest amount : ", future_value - deposit write(*, "(A,F12.2)") "The total amount : ", future_value end program compound_interest_calculator
Output
Enter the principal amount : 10000 Enter the interest rate(%) : 6 Enter the number of periods : 12 Enter the Periodic Payment : 0 The deposit amount : 10000.00 The interest amount : 10121.95 The total amount : 20121.95
Enter the principal amount : 0 Enter the interest rate(%) : 5 Enter the number of periods : 12 Enter the Periodic Payment : 1000 The deposit amount : 12000.00 The interest amount : 3917.11 The total amount : 15917.11
Enter the principal amount : 10000 Enter the interest rate(%) : 3 Enter the number of periods : 12 Enter the Periodic Payment : -300 The deposit amount : 6400.00 The interest amount : 3600.00 The total amount : 10000.00