if and else if with final variables, program not functioning properly
What I am intending to do is write a program that translates an inputted alpha form of a grade (A, B, C+, etc) into a numerical version. An A+ is considered a 4.0, and a +/- is a +3 or -3. B is a 3.0, C is a 2.0, D is a 1.0, and F is a 0. There is no F+ or F- in this program.
The problem I keep encountering at runtime is that no matter what alpha grade I input the program always seems to return a numerical grade of 0.
At runtime here is what it looks like:
Enter a letter grade: C-
The numerical value is: 0.0
But the numerical value should really be 1.7 in the above case.
Here is the constructor class:
/**
A class that assigns a numerical grade for a given letter grade.
*/
publicclass NumericalGrade
{
/**
Constructs a numerical grade for a given letter grade.
@param grade the grade inputted by the user.
*/
public NumericalGrade(int grade)
{
int n = grade;
}
/**
Gets the proper numerical grade for the letter inputted.
@return the numerical grade.
*/
publicdouble getNum()
{
double n = 0;
if (n == A1)
n = 4.0;
elseif (n == A2)
n = 4.0;
elseif (n == A3)
n = 3.7;
elseif (n == B1)
n = 3.3;
elseif (n == B2)
n = 3;
elseif (n == B3)
n = 2.7;
elseif (n == C1)
n = 2.3;
elseif (n == C2)
n = 2;
elseif (n == C3)
n = 1.7;
elseif (n == D1)
n = 1.3;
elseif (n == D2)
n = 1.0;
elseif (n == D3)
n = 0.7;
elseif (n == F)
n = 0;
return n;
}
publicstaticfinalint A1 = 1;
publicstaticfinalint A2 = 2;
publicstaticfinalint A3 = 3;
publicstaticfinalint B1 = 4;
publicstaticfinalint B2 = 5;
publicstaticfinalint B3 = 6;
publicstaticfinalint C1 = 7;
publicstaticfinalint C2 = 8;
publicstaticfinalint C3 = 9;
publicstaticfinalint D1 = 10;
publicstaticfinalint D2 = 11;
publicstaticfinalint D3 = 12;
publicstaticfinalint F = 13;
private String g;
}
And here is the tester class:
import java.util.Scanner;
/**
A class that tests the NumericalGrade class.
*/
publicclass NumericalGradeTester
{
publicstaticvoid main(String[] args)
{
Scanner in =new Scanner(System.in);
System.out.print("Enter a letter grade: ");
String input = in.next();
int n = 0;
if (input.equalsIgnoreCase("A+"))
n = NumericalGrade.A1;
elseif (input.equalsIgnoreCase("A"))
n = NumericalGrade.A2;
elseif (input.equalsIgnoreCase("A-"))
n = NumericalGrade.A3;
elseif (input.equalsIgnoreCase("B+"))
n = NumericalGrade.B1;
elseif (input.equalsIgnoreCase("B"))
n = NumericalGrade.B2;
elseif (input.equalsIgnoreCase("B-"))
n = NumericalGrade.B3;
elseif (input.equalsIgnoreCase("C+"))
n = NumericalGrade.C1;
elseif (input.equalsIgnoreCase("C"))
n = NumericalGrade.C2;
elseif (input.equalsIgnoreCase("C-"))
n = NumericalGrade.C3;
elseif (input.equalsIgnoreCase("D+"))
n = NumericalGrade.D1;
elseif (input.equalsIgnoreCase("D"))
n = NumericalGrade.D2;
elseif (input.equalsIgnoreCase("D-"))
n = NumericalGrade.D3;
elseif (input.equalsIgnoreCase("F"))
n = NumericalGrade.F;
NumericalGrade newGrade =new NumericalGrade(n);
System.out.print("The numerical value is: " + newGrade.getNum());
}
}
If anyone could please point me in the right direction I would surely appreciate it. Thank you in advance.
Message was edited by:
fairtex
