當(dāng)我輸入一個(gè)有非法分?jǐn)?shù)提示的數(shù)字時(shí)，我的問題出現(xiàn)了，它仍然向我的計(jì)數(shù)器添加一個(gè)數(shù)字，并將該數(shù)字添加到總數(shù)中，因此平均值被丟棄。我一直在絞盡腦汁，嘗試了幾乎所有方法來弄清楚。代碼有點(diǎn)草率，因?yàn)槲疫€沒有清理它，我只是想先整理一下移動(dòng)部分。public class StudentSentinel { public static void main(String[] args) { double score; double total = 0.0; double average; int scoreCount = 0; // create the Scanner object. Name it stdin Scanner stdin = new Scanner(System.in); // title at the top of the output System.out.println(" student score report");; // read the first score System.out.printf("Enter a score (1-100, -1 to quit)" + ": ", scoreCount); score = stdin.nextDouble(); scoreCount++; while (score != -1.0) { total += score; System.out.printf("Enter a score (1-100, -1 to quit)" + ": ", scoreCount); scoreCount++; score = stdin.nextDouble(); if (score < -1) System.out.println("Illegal score. Try again"); else if (score > 100) { System.out.println("Illegal score. Try again"); } // increment the loop counter } // end of for loop average = total / scoreCount; System.out.printf("\nThe average score for %d students is %8.2f\n", scoreCount, average); } // end of main } // end of class definition
2 回答
POPMUISE
TA貢獻(xiàn)1765條經(jīng)驗(yàn) 獲得超5個(gè)贊
首先檢查分?jǐn)?shù)是否合法，然后增加計(jì)數(shù)器并將其添加到您的total. 您還可以分配score和檢查不是-1通過單個(gè)操作。并且始終使用大括號(hào)（即使它們是可選的）。喜歡，
// read the first score
System.out.printf("Enter a score (1-100, -1 to quit)" + ": ", scoreCount);
while ((score = stdin.nextDouble()) != -1.0) {
if (score < -1 || score > 100) {
System.out.println("Illegal score. Try again");
} else {
scoreCount++;
total += score;
}
System.out.printf("Enter a score (1-100, -1 to quit)" + ": ", scoreCount);
}
至尊寶的傳說
TA貢獻(xiàn)1789條經(jīng)驗(yàn) 獲得超10個(gè)贊
試試這個(gè)代碼。這個(gè)對(duì)我有用：
public class StudentSentinel {
public static void main(String[] args) {
double score;
double total = 0.0;
double average;
int scoreCount = 0;
// create the Scanner object. Name it stdin
Scanner stdin = new Scanner(System.in);
// title at the top of the output
System.out.println(" student score report");;
// read the first score
System.out.printf("Enter a score (1-100, -1 to quit)" +
": ", scoreCount);
score = stdin.nextDouble();
scoreCount++;
total += score;
while (score != -1.0) {
System.out.printf("Enter a score (1-100, -1 to quit)" +
": ", scoreCount);
scoreCount++;
score = stdin.nextDouble();
if (score < -1) {
System.out.println("Illegal score. Try again");
continue;
}else if (score > 100) {
System.out.println("Illegal score. Try again");
continue;
}
total += score;
// increment the loop counter
}
// end of for loop
average = total / scoreCount;
System.out.printf("\nThe average score for %d students is %8.2f\n",
scoreCount, average);
} // end of main
}
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