回答編集履歴
2
typo 修正
answer
CHANGED
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@@ -49,7 +49,7 @@
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49
49
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try {
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50
50
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int ans = Integer.parseInt(br.readLine());
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51
51
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if (ans < 1 || ans > 3) {
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52
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-
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52
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+
errorStream.println("1 から 3 の範囲で入力してください");
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53
53
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} else {
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54
54
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return ans;
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55
55
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}
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1
数値読み込みのエラーチェックのところが気になったので、修正しました。
answer
CHANGED
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@@ -11,13 +11,13 @@
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11
11
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private String question;
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12
12
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private String candidates;
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13
13
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private int answer;
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14
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-
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14
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+
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15
15
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quiz(String q, String c, int a) {
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16
16
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question = q;
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17
17
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candidates = c;
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18
18
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answer = a;
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19
19
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}
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20
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-
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20
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+
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21
21
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public static quiz readNewQuiz(BufferedReader quizDataReader) throws IOException {
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22
22
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String q;
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23
23
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if ((q = quizDataReader.readLine()) == null) {
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@@ -33,17 +33,32 @@
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33
33
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}
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34
34
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return new quiz(q, c, Integer.parseInt(a));
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35
35
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}
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36
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-
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36
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+
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37
37
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public void printQuestion(int count, PrintStream ps) {
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38
38
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ps.println("第" + count +"問 " + question);
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39
39
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ps.println(candidates);
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40
40
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ps.println("なお、数字のみ入力してください。(以後共通)例：3");
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41
41
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}
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42
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-
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42
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+
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43
43
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public boolean checkAnswer(int ans) {
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44
44
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return answer == ans;
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45
45
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}
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46
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+
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46
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-
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47
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+
public static int readNumber(BufferedReader br, PrintStream errorStream) throws IOException {
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48
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+
while (true) {
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49
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+
try {
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50
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+
int ans = Integer.parseInt(br.readLine());
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51
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+
if (ans < 1 || ans > 3) {
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52
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+
System.out.println("1 から 3 の範囲で入力してください");
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53
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+
} else {
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54
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+
return ans;
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55
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+
}
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56
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+
} catch (NumberFormatException e) {
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57
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+
errorStream.println("数値を入力してください");
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58
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+
}
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59
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+
}
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60
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+
}
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61
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+
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47
62
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public static void main (String[]args) throws IOException {
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48
63
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BufferedReader quizDataReader = new BufferedReader(new FileReader("quizdata.txt"));
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49
64
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InputStreamReader is = new InputStreamReader(System.in);
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@@ -53,23 +68,15 @@
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53
68
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quiz q = readNewQuiz(quizDataReader);
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54
69
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if (q == null) break;
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55
70
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q.printQuestion(count, System.out);
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56
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-
int ans = 0;
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57
|
-
try {
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58
|
-
ans = Integer.parseInt(br.readLine());
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59
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-
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|
71
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+
int ans = readNumber(br, System.out);
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60
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-
}
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61
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-
if (ans < 1 || ans > 3) {
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62
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-
System.out.println("1 から 3 の数値を入力してください");
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63
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-
break;
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64
|
-
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72
|
+
if (q.checkAnswer(ans)) {
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65
73
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System.out.println("正解!第" + ++count +"問に進みます。");
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66
74
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} else {
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67
75
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System.out.println("不正解です。残念。");
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68
76
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break;
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69
77
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}
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70
78
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}
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71
|
-
}
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79
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+
}
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72
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-
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73
80
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}
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74
81
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```
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75
82
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