-1
我试着让你输入任何数量的成绩(A-F)并计算GPA并将GPA和资格返回课外活动。看起来扫描器只允许一个输入,然后打印GPA和资格。 到目前为止,这是我:扫描仪只读取一次循环? - Java
import java.util.Scanner;
public class Grades
{
public static void main(String[] args)
{
double myGPA;
int myNumClasses;
double myValue;
Scanner sc = new Scanner(System.in);
System.out.println("Press any other lettter to calculate.");
System.out.print("Enter grades: ");
String input = sc.nextLine();
myValue = 0;
myNumClasses = 0;
myGPA = 0;
for (String next = sc.next(); input.equalsIgnoreCase("a") || input.equalsIgnoreCase("b") ||
input.equalsIgnoreCase("c")|| input.equalsIgnoreCase("d") || input.equalsIgnoreCase("f"); next = sc.next())
{
if (input.equalsIgnoreCase("a"))
{
myValue += 4.0;
myNumClasses += 1;
}
else if (input.equalsIgnoreCase("b"))
{
myValue += 3.0;
myNumClasses += 1;
}
else if (input.equalsIgnoreCase("c"))
{
myValue += 2.0;
myNumClasses += 1;
}
else if (input.equalsIgnoreCase("d"))
{
myValue += 1.0;
myNumClasses += 1;
}
else if (input.equalsIgnoreCase("f"))
{
myNumClasses += 1;
}
myGPA = myValue/myNumClasses;
if (myGPA >= 2.0 && myNumClasses >= 4)
{
System.out.println("Eligible");
}
else if (myNumClasses < 4)
{
System.out.println("Ineligible, taking less than 4 classes");
}
else if (myGPA >= 2.0 && input.equalsIgnoreCase("f"))
{
System.out.println("Ineligible, gpa above 2.0 but has F grade");
}
else if (myGPA <= 2.0 && input.equalsIgnoreCase("f"))
{
System.out.println("Ineligible, gpa below 2.0 and has F grade");
}
else if (myGPA < 2.0)
{
System.out.println("Inelligible, gpa below 2.0");
}
System.out.println("Your GPA = " + myGPA);
}
}
}
你永远不更新'input' - 不知道,如果你想太多,虽然,这是很清楚的代码。 – Obicere