41 lines
949 B
JavaScript
41 lines
949 B
JavaScript
const readline = require("readline");
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const rl = readline.createInterface(
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process.stdin, process.stdout
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);
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let student_num = 10;
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let grades = new Array(student_num); // 类似于C/C++中数组的数据结构，空间复杂度O(n)
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function input(remain_times) {
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if (remain_times <= 0) {
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rl.close();
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return;
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}
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rl.question("", (answer) => {
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grades[student_num - remain_times] = parseFloat(answer); // 暂时不考虑输入错误
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input(remain_times - 1);
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});
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}
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rl.on("close", () => {
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let sum = grades.reduce((sum, current) => {
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return sum + current;
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}, 0); // 时间复杂度O(n)
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let average = sum / student_num;
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console.log("平均分为：", average);
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});
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rl.write("输入"+student_num+"名学生的成绩，一个一行：\n");
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input(student_num);
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// 输入10名学生的成绩，一个一行：
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// 1
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// 2
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// 3
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// 4
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// 5
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// 6
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// 7
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// 8
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// 9
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// 10
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// 平均分为： 5.5
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