在此租赁计划中，我需要向用户显示最高和最低租金。该程序适用于其他方法，但它显示最大值和最小值的最大值。这是我写的代码：
import java.util.Scanner; // program uses Scanner
public class CarRentalTest {
public static void main(String[] args) {
System.out.println("Welcome to Rental Portal");
Scanner input = new Scanner(System.in); // create Scanner to obtain
// input from command window
CarRental details = new CarRental();
int N = 8; // Total number of passengers
String summary =
"\t\t\t Summary of Car Rentals \t\n"
+ "\t\t\t========================================\n"
+ "\tName \t\t Days \t\t Special Offer \t\t Charge \n";
double maxRent = 0.0;
double minRent = 0.0;
double temp = 0.0;
int count = 0;
int count1 = 0;
int days = 0;
String high = "";
String low = "";
for (int i = 0; i <= 2; i++) {
details = new CarRental();
System.out.println("Enter the name of Passenger: ");
details.passenger = input.next(); // read customer name
details.setName(details.passenger);
System.out.println("Enter Number of days you wish to rent a car: ");
details.days = input.nextInt(); // read number of days
if (days > 365) {
System.out.print("\nNumber of Days must not exceed 365");
System.out.print("\nPlease enter number of days again: ");
details.days = input.nextInt();
details.setDays(details.days);
}
details.getRent();
System.out.println("Do you want to use the special offer?");
details.userResponse = input.next();
System.out.println("The total amount of rent for "
+ details.getName() + " is: $" + details.getRent());
summary = summary + "\t" + details.getName() + " \t\t "
+ details.getDays() + " \t\t " + details.userResponse
+ " \t\t\t $" + details.getRent() + "\n";
System.out
.println("-----------------------------------------------");
}
System.out.println(summary + "\n");
System.out.println("-------------------------------------------------");
for (int i = 0; i < N; i++) {
do {
details.cost = details.getRent();
if (minRent > details.cost)
minRent = details.cost;
if (maxRent < details.cost)
maxRent = details.cost;
} while (details.cost == 0);
}
System.out.println("The customer spending most rental is" + high + " "
+ maxRent);
System.out.println("The customer spending least rental is" + low + " "
+ minRent);
System.out.println();
for (int i = 0; i < N; i++) {
if (details.days < 7) {
count = count + 1;
} else {
count1 = count1 + 1;
}
}
System.out.print("The rental days < 7: ");
for (int j = 0; j < count; j++) {
System.out.print("*");
}
System.out.println();
System.out.print("The rental days >= 7: ");
for (int j = 0; j < count1; j++) {
System.out.print("*");
}
}
}// end method main
我添加了一个do-while循环，它计算最大租金但不计算最小值。任何帮助将不胜感激。
答案 0 :(得分：0)
对于初学者，您正在从相同的details.getRent()方法中检索minRent和maxRent的值....因此它们是相同的......
for (int i = 0; i < N; i++) {
if (maxRent < details.getRent()) {
maxRent = details.getRent();
high = details.getName();
}
if (i == 0) {
temp = details.getRent();
}
if (temp >= details.getRent()) {
minRent = details.getRent();
temp = details.getRent();
low = details.getName();
}
if (maxRent < details.getRent()) {
maxRent = details.getRent();
high = details.getName();
}
}
答案 1 :(得分：0)
感谢 @ TheJavaCoder16 代码是完全正确的，除了有问题的for循环放在摘要下面。这里是更正的代码。
import java.util.Scanner; // program uses Scanner
public class CarRentalTest {
public static void main( String[] args )
{
System.out.println("\t\t ******Welcome to Rental Portal******");
Scanner input = new Scanner( System.in );
CarRental details=new CarRental(); // create a CarRental object
int N=3; // Total number of passengers
String summary="\t\t\t Summary of Car Rentals \t\n"+"\t\t========================================\n"+"\tName \t\t Days \t\t Special Offer \t\t Charge \n";
double maxRent=0.0;//to display maximum rent value
double minRent=0.0; //To display minimum rent value
double temp=0.0; // A temp variable to compare minimum and maximum rent values
int count1=0; // Variable to count days
int count2=0; //Variable to count days
String high=""; // Displays user with highest rent
String low=""; // Displays user with least rent
for(int i=0;i<N;i++){ //Reading data from Scanner and Calculating rent
System.out.println( "Enter the name of Passenger: " ); // prompt for input
details.passenger = input.next(); // read customer name
details.setName(details.passenger); //set passenger name
System.out.println( "Enter Number of days you wish to rent a car: " ); // prompt for input
details.days = input.nextInt(); // read number of days
if(details.days>365){
// if user enters invalid number of days ask for entering again
System.out.print("\nNumber of Days must not exceed 365");
System.out.print("\nPlease enter number of days again: ");
details.days=input.nextInt();
details.setDays(details.days);
}
details.getRent(); //calculate rent
System.out.println( "Do you want to use the special offer?" ); // prompt for input
details.userResponse = input.next();// read user response and based on that calculate rent
System.out.println("The total amount of rent for " +details.getName()+ " is: $"+details.getRent());
summary=summary+"\t"+details.getName()+" \t\t "+details.getDays()+" \t\t "+details.userResponse+" \t\t\t $"+details.getRent()+"\n";
System.out.println("-----------------------------------------------");
//Calculate the maximum and minimum rent values
// and the associated passenger names
for(int j=0;j<=N;j++){
if(maxRent < details.getRent()){
maxRent = details.getRent();
high = details.getName();
}
if(i==0){
temp = details.getRent() ;
}
if(temp >= details.getRent()){
minRent = details.getRent();
temp = details.getRent();
low = details.getName();
}
if(maxRent < details.getRent()){
maxRent = details.getRent();
high = details.getName();
}
}
}
System.out.println(summary+"\n");
System.out.println("-------------------------------------------------");
System.out.println("The customer spending most rental is " +high+ " "+maxRent);
System.out.println("The customer spending least rental is " +low+ " "+minRent);
System.out.println();
}
}//end method main