私のコードは完成し、ほとんどの部分で機能しています。これが私が持っているものです
import java.util.*;
import java.io.*;
import java.text.*;
public class Proj5 {
public static void main(String[] args)throws IOException{
Scanner s = new Scanner(System.in);
PrintWriter outFile = new PrintWriter(new File("results.txt"));
int [] quizKey = {1,1,2,2,1,1,3,2,4,1,3,5,4,1,2};
String [] userAnswers = new String[100];
String [] wid = new String[100];
int [] numCorrect = new int[quizKey.length];
DecimalFormat df = new DecimalFormat("#0.0");
int max;
int min;
int lines=0;
readInText(s);
s = readInText(s);
while(s.hasNext()){
String line = s.nextLine();
String[] tokens = line.split(",");
wid[lines] = tokens[0];
userAnswers[lines] = tokens[1];
lines ++;
}// end while loop
long[][] userAnswersInt = new long[lines][quizKey.length];
numCorrect = gradeSingleQuiz(lines, quizKey, userAnswers, numCorrect, userAnswersInt);
double[] percentCorrect = new double[lines];
percentCorrect = percentCorrect(lines, numCorrect, numCorrect);
char[] grades = new char[lines];
grades = grade(numCorrect, lines);
max=max(numCorrect);
min=min(numCorrect);
displayOutput(outFile, wid, lines, numCorrect, grades, percentCorrect);
averageScore(outFile, max, min, lines, percentCorrect);
}//end main
public static Scanner readInText(Scanner s)throws IOException{
/*String input;
System.out.print("Enter name of the file: ");
input=s.nextLine();
System.out.println(input);
while(input!="QuizScores.txt"){
System.out.println("invalid file entered, please enter the correct anem of the file: ");
input=s.nextLine();
}
*/
Scanner inFile = new Scanner(new File("QuizScores.txt"));
return inFile;
}// end readInText
public static String[] userAnswers(String userAnswers[]){
return userAnswers;
}
/**
* calculates the grades of the tests
*
* @param lines - number of
* @param quizKey - answers to the test
* @param userAnswers - string version of user answers
* @param numCorrect - number of answers correct
* @param userAnswersInt - int version of user answers
* @return numCorrect - number of answers correct
*/
public static int[] gradeSingleQuiz(int lines, int quizKey[], String userAnswers[], int numCorrect[], long userAnswersInt[][]){
for (int j=0; j<lines; j++){
numCorrect[j]=0;
long[] ara = new long[quizKey.length];
ara [j] = Long.parseLong(userAnswers[j]);
for(int p=0; p<ara.length; p++){
userAnswersInt[j][p]=ara[j]%10;
ara[j]=ara[j]/10;
}
int rows = userAnswersInt.length;
int cols = userAnswersInt[0].length;
long[][] userAnswersReverse = new long[rows][cols];
if(j==4){
for(int q=0; q<userAnswersInt.length;q++){
for(int w = cols-1; w >=0; w--){
userAnswersReverse[q][cols-1-w] = userAnswersInt[q][w];
}
}
}
if(j==4){
for(int r=0; r<lines; r++){
for(int n=0; n<quizKey.length; n++){
System.out.println(userAnswersReverse[r][n]);
if(userAnswersReverse[r][n]==(quizKey[n])){
numCorrect[r]++;
}
}
}
}
}//end for loop
return numCorrect;
}// end gradeSingleQuiz
/**
* calculates the max
*
* @param numCorrect - number of correct answers
* @return max - the highest number of correct answers
*/
public static int max(int numCorrect[]){
int max = numCorrect[0];
for(int r=0; r<numCorrect.length; r++){
if(numCorrect[r]>max){
max=numCorrect[r];
}
}
return max;
}
/**
* calculates the min
*
* @param numCorrect - number of correct answers
* @return min - the lowest number of correct answers
*/
public static int min(int numCorrect[]){
int min = numCorrect[0];
for(int r=0; r<numCorrect.length; r++){
if(numCorrect[r]<min){
min=numCorrect[r];
}
}
return min;
}
/**
* grade of the test
*
* @param numCorrect - number of answers correct
* @param lines - number of lines in file
* @return grade - the letter grade is being returned)
*/
public static char[] grade(int numCorrect[], int lines){
char[] grade = new char[lines];
for (int j=0; j<lines; j++){
if(numCorrect[j]>=14)
grade[j]='A';
else if((numCorrect[j]>=12)&&(numCorrect[j]<14))
grade[j]='B';
else if((numCorrect[j]>=11)&&(numCorrect[j]<12))
grade[j]='C';
else if ((numCorrect[j]>=9)&&(numCorrect[j]<11))
grade[j]='D';
else
grade[j]='F';
}
return grade;
}//end grade
/**
* percent of the answers correct
*
* @param lines - number of lines in file
* @param numCorrect - number of answers correct
* @param quizKey - correct answers
* @return centCorrect - percent of correct answers (1)
*/
public static double[] percentCorrect(int lines, int numCorrect[], int quizKey[]){
double[] centCorrect = new double[lines];
for (int j=0; j<lines; j++){
centCorrect[j] = (numCorrect[j]/quizKey.length)*100;
}
return centCorrect;
}
/**
* average of all the test scores & displays min and max
*
* @param min - lowest score
* @param max - highest score
* @param lines - number of lines in file
* @param percentCorrect - percent of correct answers
* @return none
*/
public static void averageScore(PrintWriter outFile, int min, int max, int lines, double percentCorrect[]){
double add=0;
for(int d=0; d<lines; d++){
add = percentCorrect[d] + add;
}//end for loop
add=add/lines;
System.out.println("Average: " + add + "%");
outFile.println("Average: " + add + "%");
System.out.println("High Score: " + max);
outFile.println("High Score: " + max);
System.out.println("Low Score: " + min);
outFile.println("Low Score: " + min);
}// end averageScore
/**
* displays the student id number correct percent correct and grade
*
* @param wid - wildcat ID
* @param lines -number of lines in file
* @param numCorrect - number of answers correct
* @param grades - grade of test
* @param percentCorrect - percent of answers correct
* @return none
*/
public static void displayOutput( PrintWriter outFile, String wid[], int lines, int numCorrect[], char grades[], double percentCorrect[]){
System.out.println("Student ID # Correct %Correct Grade");
outFile.println("Student ID # Correct %Correct Grade");
for(int i=0; i<lines; i++){
System.out.println(" " + wid[i] + " " + numCorrect[i] + " " +
(percentCorrect[i]) + "%" + " " + grades[i]);
outFile.println(" " + wid[i] + " " + numCorrect[i] + " " +
(percentCorrect[i]) + "%" + " " + grades[i]);
}
}// end display output
}//end class
これは、ユーザー入力要件を含めない場合に得られる出力です。
Student ID # Correct %Correct Grade
4563123 15 100.0% A
2312311 9 0.0% D
2312345 13 0.0% B
5527687 9 0.0% D
7867567 6 0.0% F
Average: 20.0%
High Score: 0
Low Score: 15
それで、私はこれに関する私の問題から始めます。全体的にはうまく機能します。何らかの理由で、ハイスコア（最大）とロースコア（最小）に加えて、percentCorrect配列（私は100％ではないと思います）に値を割り当てていませんなぜこれが起こっているのかわからないので、それらのことを手伝ってくれると本当に助かります。
私のもう1つの問題はこれです。ユーザーにファイルの名前を入力するように依頼する必要があります。間違った名前を入力した場合は、入力したことを知らせ、正しくなるまでもう一度尋ねます。これを実装しました:
String input;
System.out.print("Enter name of the file: ");
input=s.nextLine();
System.out.println(input);
while(input!="QuizScores.txt"){
System.out.println("invalid file entered, please enter the correct anem of the file: ");
input=s.nextLine();
}
しかし、正しい文字列 (大文字とすべて) を入力しても、「無効なファイルを送信してください...」という行が出力されるため、機能しません。ここでも何が間違っているのかわかりません。これは素晴らしいでしょう。
前もって感謝します
編集：
さて、問題はこれらのコード ブロックにあると思います (これも 100% ではありません)。
percentCorrect = percentCorrect(lines, numCorrect, numCorrect);
および/または
public static double[] percentCorrect(int lines, int numCorrect[], int quizKey[]){
double[] centCorrect = new double[lines];
for (int j=0; j<lines; j++){
centCorrect[j] = (numCorrect[j]/quizKey.length)*100;
}
return centCorrect;
}
および/または
public static int max(int numCorrect[]){
int max = numCorrect[0];
for(int r=0; r<numCorrect.length; r++){
if(numCorrect[r]>max){
max=numCorrect[r];
}
}
return max;
および/または
public static int min(int numCorrect[]){
int min = numCorrect[0];
for(int r=0; r<numCorrect.length; r++){
if(numCorrect[r]<min){
min=numCorrect[r];
}
}
return min;
}
私が引っ張っているファイルはこれです：
4563123,112211324135412
2312311,222121324135211
2312345,112211324135421
5527687,212111313124412
7867567,111111111111111