[英]Unsure about calculating commission based on user input
public static void main(String[] args) {
Scanner keybNum = new Scanner(System.in);
Scanner keybStr = new Scanner(System.in);
boolean yn = false;
//Start of program
System.out.println("Welcome to Currency Exchanger");
System.out.print("Are you an Account Holder (y or n)? ");
String AccHolder = keybStr.next();
boolean blnYN = true;
//validation of y/n answer
while (blnYN) {
if (AccHolder.equalsIgnoreCase("y")) {
yn = true;
blnYN = false;
break;
}//if
else if (AccHolder.equalsIgnoreCase("n")) {
yn = false;
blnYN = false;
break;
}//else if
else {
System.out.println("Invalid value entered. Choose either y/n.");
AccHolder = keybStr.next();
}//else
}//while
//Start of menu choices
System.out.println("Please choose from the following menu.");
System.out.println("\n1: Exchange another currency for Sterling");
System.out.println("2: Buy another currency from us");
System.out.println("0: Exit");
System.out.print("Which option? ");
int MenuChoice = keybNum.nextInt();
//Exchange Variables (First option)
double Euro = 1.37;
double USAD = 1.81;
double JapYen = 190.00;
double Zloty = 5.88;
//Buy Variables (Second Option)
double EuroB = 1.21;
double USADB = 1.61;
double JapYenB = 163.00;
double ZlotyB = 4.89;
//First menu choice screen
if (MenuChoice == 1) {
System.out.println("Currencies to exchange into sterling?");
System.out.println("Euro - EUR");
System.out.println("USA Dollar - USD");
System.out.println("Japanese Yen - JPY");
System.out.println("Polish Zloty - PLN");
System.out.print("Please enter the three letter currency: ");
//Currency input validation
String CurChoice = "";
boolean isCorrectCurrency = false;
do {
CurChoice = keybStr.next();
isCorrectCurrency = CurChoice.matches("^EUR|USD|JPY|PLN$");
if (isCorrectCurrency) {
System.out.println("");
} else {
System.out.print("Invalid Currency Entered. Please Retry: ");
}
} while (!isCorrectCurrency);
//Exchange amount calculator
System.out.print("Enter the amount you wish to exchange of " + CurChoice + ": ");
double ExcAmount = keybStr.nextInt();
double result = 0.00;
//Selection and calculation of user's input
if (CurChoice.equals("EUR")) {
result = ExcAmount / Euro;
DecimalFormat df = new DecimalFormat("#.##");
System.out.println(ExcAmount + " in " + CurChoice + "\t=£" + df.format(result));
} else if (CurChoice.equals("USD")) {
result = ExcAmount / USAD;
DecimalFormat df = new DecimalFormat("#.##");
System.out.println(ExcAmount + " in " + CurChoice + "\t=£" + df.format(result));
} else if (CurChoice.equals("JPY")) {
result = ExcAmount / JapYen;
DecimalFormat df = new DecimalFormat("#.##");
System.out.println(ExcAmount + " in " + CurChoice + "\t=£" + df.format(result));
} else if (CurChoice.equals("PLN")) {
result = ExcAmount / Zloty;
DecimalFormat df = new DecimalFormat("#.##");
System.out.println(ExcAmount + " in " + CurChoice + "\t=£" + df.format(result));
} else {
System.out.println("");
}
是的,這就是我被困住的地方。 因此,該程序是貨幣兌換轉換器。 我不確定的部分是計算佣金。 首先,我詢問用戶是否是帳戶持有人。 如果他們是他們,則不收取任何佣金,而如果他們是,則應收取佣金。 如果他們希望兌換的金額少於1000英鎊,則收取2%的佣金;如果超過1000英鎊,則收取1%的佣金。 我不確定如何將其實現到我的程序中,所以我要求你們提供幫助。
計算結果后請嘗試以下操作:
double commission = 0.;
if (ExcAmount < 1000) {
commission = result * 0.02;
} else {
commission = result * 0.01;
}
result += commission;
String stringToPrint = "";
if (!yn) { //you could use meaningful variable names
stringToPrint = "Commission = " + commission;
} else {
stringToPrint = "Commission = Not charged";
}
System.out.println(stringToPrint + "\nTotal = " + (result - commission));
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