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我正在用Java構建一個年級計算器,我在添加一些功能時遇到了麻煩,而且我似乎在嘗試做出改變。我整個星期都在努力研究它,並在書中和幻燈片中重新開始,我只是覺得還有一些片段我還沒有得到。指導所需的無效的輸入錯誤和級別計算器的協作類統計
我需要確保無效分數,重新輸入錯誤每次出現負分時輸入。然後我需要計算平均分,最低分和最高分的班級統計。所以基本上是輸入多少數據的協作,可以是任意數量的考試或學生。
這是我的代碼,請讓我知道,如果你需要更多的信息。我對此很新,所以我很抱歉,這不是最好的。
import java.util.Scanner;
public class GradeCalculator {
public static void main(String[] args){
double examAverage = 0, scoresEntered = 0, examSum = 0;
double totalExamSum = 0, allScoresEntered = 0;
//variables for input
Scanner GC = new Scanner(System.in);
//Scanner for integer inputs
System.out.println("Welcome to Grade Calculator!" +"\n");
System.out.println("Please enter the number of students:");
int numberStudents = GC.nextInt();
//number of students input
System.out.println("Please enter the number of exams:");
int numberOfExams = GC.nextInt();
//number of exams input
for (int i = 1; i <= numberStudents; i++) {
Scanner name = new Scanner(System.in);
//scanner for student name input
//Scanner for name input
System.out.println("\n--------------------------------------");
System.out.print("Enter student " + i + "'s name : ");
String studentname = name.nextLine();
//student name input
System.out.print("Enter exam scores : ");
for (int j = 0; j < numberOfExams; j++) {
scoresEntered = GC.nextDouble();
examSum = (examSum + scoresEntered);}
//score input and sum of all input scores
do{
System.out.println("Invalid exam scores, reenter: ");
scoresEntered =GC.nextDouble();
} while(scoresEntered<0);
//my attempt at the Invalid exam score error
examAverage = (examSum/numberOfExams);
//examaverage calculator
System.out.println("\n--------------------------------------");
System.out.println("Grade Statistics for " + name);
System.out.println(" Average : " + examAverage);
//Conditions and print outputs below for grade averages
if(examAverage <= 100 & examAverage >=90){
System.out.println(" Letter Grade: A");
System.out.println(" " + name + " gets 4 stars! ****");
examAverage = 0;
examSum = 0;}
else if(examAverage <=89.99 & examAverage >=80){
System.out.println(" Letter Grade: B");
System.out.println(" " + name + " " + " gets 3 stars! ***");
examAverage = 0;
examSum = 0;}
else if(examAverage <=79.99 & examAverage >=70){
System.out.println(" Letter Grade: C");
System.out.println(" " + name + " " + " gets 2 stars! **");
examAverage = 0;
examSum = 0;}
else if(examAverage <=69.99 & examAverage >=60){
System.out.println(" Letter Grade: D");
System.out.println(" " + name + " " + " gets 1 stars! *");
examAverage = 0;
examSum = 0;}
else if(examAverage <=59.99 & examAverage >=50){
System.out.println(" Letter Grade: F");
System.out.println(" " + name + " " + " gets 0 stars!");
examAverage = 0;
examSum = 0;}
//still need class statistics as well as help with the invalid exam scores, reenter error.
}
}
}
哦,我的天哪,幫助了很多。非常感謝!哇,即使你大聲朗讀,它也很有意義。像這樣,它等於0打印此。再次感謝你! – pau85 2014-10-12 13:14:34