Я получаю ошибку выше в моей программе. Он выделяет эту строку кода в классе курса:Метод средний по классу Ученик не может применяться к заданным типам
возврата (s1.average() + s1.average() + s1.average() + s1.average() + s1.average())/5,0;
Это класс курса. Причина, по которой скобки были прокомментированы, заключалась в том, что мой инструктор сказал мне сделать это.
public class Course extends Student
{
private String course;
private Student s1, s2, s3, s4, s5;
private int studentcount = 1;
public Course (String name)
{
super(); //
course = name;
}
public Student addStudent(String first, String last, Address home, Address school)
{
//if (studentcount == 1){
s1 = new Student(first,last,home,school);
studentcount++;
return s1;
//}
//if (studentcount == 2) {
s2 = new Student(first,last,home,school);
studentcount++;
return s2;
//}
//else if (studentcount == 3){
s3 = new Student(first,last,home,school);
studentcount++;
return s3;
//}
// else if (studentcount == 4){
s4 = new Student(first,last,home,school);
studentcount++;
return s4;
//}
//else if (studentcount == 5) {
s5 = new Student(first,last,home,school);
studentcount++;
return s5;
//}
//else {
System.out.println("No More students allowed in the class");
return null;
//}
}
public double average()
{
}
public String roll()
{
String results = "";
if (studentcount == 1){
results += s1.toString() +"n";
return results;
}
if (studentcount == 2) {
results += s1.toString() +"n";
results += s2.toString() +"n";
return results;
}
else if (studentcount == 3){
results += s1.toString() +"n";
results += s2.toString() +"n";
results += s3.toString() +"n";
return results;
}
else if (studentcount == 4){
results += s1.toString() +"n";
results += s2.toString() +"n";
results += s3.toString() +"n";
results += s4.toString() +"n";
return results;
}
else if (studentcount == 5) {
results += s1.toString() +"n";
results += s2.toString() +"n";
results += s3.toString() +"n";
results += s4.toString() +"n";
results += s5.toString() +"n";
return results;
}
else{
return null;
}
}
}
Это класс Student:
public class Student
{
Address home = new Address("1027 Charleston St","Lincoln", "Ne", 68508);
Address school = new Address("1534 E St", "Lincoln", "Ne", 68508);
Student mike = new Student("Mike", "Vinci", home, school);
Student john = new Student("John", "Doe", home, school, 90, 80, 199);
//Below are the ints used
int test1 = 0;
int test2 = 0;
int test3 = 0;
int avg2;
int error = 0;
public Student(){
//empty
}
public void setTestScore(int testNum, int score)
{
if (testNum == 1)
test1 = score;
else if (testNum == 2)
test2 = score;
else if (testNum == 3)
test3 = score;
}
public int getTestScore(int testNum)
{
if (testNum == 1)
return test1;
else if (testNum == 2)
return test2;
else if (testNum == 3)
return test3;
else
return error;
}
public double average(int test1, int test2, int test3)
{
int avg2 = ((test1 + test2 + test3)/3); //finds the average of the tests
return avg2;
}
private String firstName, lastName; //private ints for coding
private Address homeAddress, schoolAddress;
public Student (String first, String last, Address home, Address school)
{
firstName = first;
lastName = last;
homeAddress = home;
schoolAddress = school;
}
public Student (String first, String last, Address home, Address school, int test11, int test22, int test33)
{
firstName = first;
lastName = last;
homeAddress = home;
schoolAddress = school;
test11 = test1;
test22 = test2;
test33 = test3;
}
public String toString()
{
String result;
result = firstName + " " + lastName + "\n";
result += "Home Address:\n" + homeAddress + "\n";
result += "School Address:\n" + schoolAddress + "\n";
result += "Average=" + avg2 + " with Tests: " + test1 + ", " + test2 + ", " + test3;
return result; //returns the result
}
class Address
{
private String streetAddress, city, state;
private long zipCode;
public Address(String street, String town, String st, long zip)
{
streetAddress = street;
city = town;
state = st;
zipCode = zip;
}
public String toString()
{
String result;
result = streetAddress + "\n";
result += city + "," + state + " " + zipCode;
return result; //returns the result
}
}
}
Так что вопрос как бы я исправить эту ошибку?
так что вопрос: точно? на что вы ожидаете от нас ответа? – MWiesner
Как исправить эту ошибку? извините, я добавлю это в сообщение – TheUnicornMaster
, если вы зададите «хороший» вопрос - другие будут лучше давать вам лучшие ответы, если они точно поймут, что вы ищете;) – MWiesner