有人能教我如何对用户输入的数据进行排序吗？我打算从表中对数据（标记）进行排序，并获得结果，例如从最高到最低排序标记。 我目前需要帮助排序的代码。
//Brandon Tan P1514627
//Zong Wei P151
//Javascript
//Table headers
document.write("<table><th style='width:25px'>No.</th>");
document.write("<th style='width:100px'>Name</th>");
document.write("<th style='width:100px'>Attendance</th>");
document.write("<th style='width:100px'>Homework</th>");
document.write("<th style='width:100px'>Midterm Test</th>");
document.write("<th style='width:100px'>Final Exam</th>");
document.write("<th style='width:100px'>Final Grade</th>");
document.write("<th style='width:100px'>Letter Grade</th>");
//Setting the component weightage
do{
var weightAtt = parseFloat(prompt("Enter the weightage of attendance"));
while (weightAtt<=0 || weightAtt>=1 || isNaN(weightAtt)) {
alert("The weightage of attendance must a positive number less than 1");
var weightAtt = parseFloat(prompt("Enter the weightage of attendance"));
}
var weightHw = parseFloat(prompt("Enter the weightage of homework"));
while (weightHw<=0 || weightHw>=1 || isNaN(weightHw)) {
alert("The weightage of homework must a positive number less than 1");
var weighthw = parseFloat(prompt("Enter the weightage of homework"));
}
var weightMdt = parseFloat(prompt("Enter the weightage of midterm test"));
while (weightMdt<=0 || weightMdt>=1 || isNaN(weightMdt)) {
alert("The weightage of midterm test must a positive number less than 1");
var weightMdt = parseFloat(prompt("Enter the weightage of midterm test"));
}
var weightFx = parseFloat(prompt("Enter the weightage of final exam"));
while (weightFx<=0 || weightFx>=1 || isNaN(weightFx)) {
alert("The weightage of final exam must a positive number less than 1");
var weightFx = parseFloat(prompt("Enter the weightage of final exam"));
}
if ([weightAtt + weightHw + weightMdt + weightFx] != 1) {
alert("The total weightage of all components must be equals to 1!");
}
}
while ([weightAtt + weightHw + weightMdt + weightFx] != 1);
//----------------------------------------------------------------------------
//Enter the number of students you want to enter the grades for
var numStudents = parseInt(prompt("Enter the number of students"));
while (numStudents<=0 || isNaN(numStudents)) {
alert("The number of students must a postive integer!");
var numStudents = parseInt(prompt("Enter the number of students"));
}
//Loop
for(var i = 0; i < numStudents; i++){
var no = i + 1;
document.write("<tr><td style='width:25px'>" + no + "</td>");
var name = prompt("Enter the student's name");
document.write("<td style='width:100px'>" + name + "</td>");
//----------------------------------------------------------------------------
var att = parseFloat(prompt("Enter " + name + "'s attendance"));
while (att<0 || att>100 || isNaN(att)) {
alert("Attendance marks must be a number between 0-100!");
var att = parseFloat(prompt("Enter " + name + "'s attendance"));
}
document.write("<td style='width:100px'>" + att + "</td>");
//---------------------------------------------------------------------------
var hw = parseFloat(prompt("Enter " + name + "'s homework"));
while (hw<0 || hw>100 || isNaN(hw)) {
alert("Homework marks must be a number between 0-100!");
var hw = parseFloat(prompt("Enter " + name + "'s homework"));
}
document.write("<td style='width:100px'>" + hw + "</td>");
//----------------------------------------------------------------------------
var mdt = parseFloat(prompt("Enter " + name + "'s midterm test"));
while (mdt<0 || mdt>100 || isNaN(mdt)) {
alert("Midterm Test marks must be a number between 0-100!");
var mdt = parseFloat(prompt("Enter " + name + "'s midterm test"));
}
document.write("<td style='width:100px'>" + mdt + "</td>");
//----------------------------------------------------------------------------
var fx = parseFloat(prompt("Enter " + name + "'s final exam"));
while (fx<0 || fx>100 || isNaN(fx)) {
alert("Final Exam marks must be a number between 0-100!");
var fx = parseFloat(prompt("Enter " + name + "'s final exam"));
}
document.write("<td style='width:100px'>" + fx + "</td>");
//---------------------------------------------------------------------------
var fg = att * weightAtt + hw * weightHw + mdt * weightMdt + fx * weightFx
document.write("<td style='width:100px'>" + fg + "</td>");
//----------------------------------------------------------------------------
var lg = 0;
if(fg >= 80){
lg = "A";
}
else if(fg < 80 && fg >= 70){
lg = "B";
}
else if(fg < 70 && fg >= 60){
lg = "C";
}
else if(fg < 60 && fg >=50){
lg = "D";
}
else if (fg >= 0 && fg < 50){
lg = "F";
}
document.write("<td style='width:100px'>" + lg + "</td></tr>");
}
document.write("</table>");
答案 0 :(得分：1)
以下是FIDDLE
的示例请注意，脚本/小提琴需要4个值，总共1个 - 例如0.25,0.15,0.35,0.25退出第一个循环
//Javascript
var html = "";
//Table headers
html += "<table><th style='width:25px'>No.</th>";
html += "<th style='width:100px'>Name</th>";
html += "<th style='width:100px'>Attendance</th>";
html += "<th style='width:100px'>Homework</th>";
html += "<th style='width:100px'>Midterm Test</th>";
html += "<th style='width:100px'>Final Exam</th>";
html += "<th style='width:100px'>Final Grade</th>";
html += "<th style='width:100px'>Letter Grade</th>";
//Setting the component weightage
do {
var weightAtt = parseFloat(prompt("Enter the weightage of attendance"));
while (weightAtt <= 0 || weightAtt >= 1 || isNaN(weightAtt)) {
alert("The weightage of attendance must a positive number less than 1");
var weightAtt = parseFloat(prompt("Enter the weightage of attendance"));
}
var weightHw = parseFloat(prompt("Enter the weightage of homework"));
while (weightHw <= 0 || weightHw >= 1 || isNaN(weightHw)) {
alert("The weightage of homework must a positive number less than 1");
var weighthw = parseFloat(prompt("Enter the weightage of homework"));
}
var weightMdt = parseFloat(prompt("Enter the weightage of midterm test"));
while (weightMdt <= 0 || weightMdt >= 1 || isNaN(weightMdt)) {
alert("The weightage of midterm test must a positive number less than 1");
var weightMdt = parseFloat(prompt("Enter the weightage of midterm test"));
}
var weightFx = parseFloat(prompt("Enter the weightage of final exam"));
while (weightFx <= 0 || weightFx >= 1 || isNaN(weightFx)) {
alert("The weightage of final exam must a positive number less than 1");
var weightFx = parseFloat(prompt("Enter the weightage of final exam"));
}
if ([weightAtt + weightHw + weightMdt + weightFx] != 1) {
alert("The total weightage of all components must be equals to 1!");
}
}
while ([weightAtt + weightHw + weightMdt + weightFx] != 1);
//----------------------------------------------------------------------------
//Enter the number of students you want to enter the grades for
var numStudents = parseInt(prompt("Enter the number of students"));
while (numStudents <= 0 || isNaN(numStudents)) {
alert("The number of students must a postive integer!");
var numStudents = parseInt(prompt("Enter the number of students"));
}
//Loop
var students = [];
for (var i = 0; i < numStudents; i++) {
students[i] = {}
var name = prompt("Enter the student's name");
students[i].name = name;
//----------------------------------------------------------------------------
var att = parseFloat(prompt("Enter " + name + "'s attendance"));
while (att < 0 || att > 100 || isNaN(att)) {
alert("Attendance marks must be a number between 0-100!");
att = parseFloat(prompt("Enter " + name + "'s attendance"));
}
students[i].att=att;
//---------------------------------------------------------------------------
var hw = parseFloat(prompt("Enter " + name + "'s homework"));
while (hw < 0 || hw > 100 || isNaN(hw)) {
alert("Homework marks must be a number between 0-100!");
hw = parseFloat(prompt("Enter " + name + "'s homework"));
}
students[i].hw=hw;
//----------------------------------------------------------------------------
var mdt = parseFloat(prompt("Enter " + name + "'s midterm test"));
while (mdt < 0 || mdt > 100 || isNaN(mdt)) {
alert("Midterm Test marks must be a number between 0-100!");
mdt = parseFloat(prompt("Enter " + name + "'s midterm test"));
}
students[i].mdt=mdt;
//----------------------------------------------------------------------------
var fx = parseFloat(prompt("Enter " + name + "'s final exam"));
while (fx < 0 || fx > 100 || isNaN(fx)) {
alert("Final Exam marks must be a number between 0-100!");
fx = parseFloat(prompt("Enter " + name + "'s final exam"));
}
students[i].fx=fx;
//---------------------------------------------------------------------------
var fg = att * weightAtt + hw * weightHw + mdt * weightMdt + fx * weightFx
students[i].fg=fg;
//----------------------------------------------------------------------------
var lg = 0;
if (fg >= 80) {
lg = "A";
} else if (fg < 80 && fg >= 70) {
lg = "B";
} else if (fg < 70 && fg >= 60) {
lg = "C";
} else if (fg < 60 && fg >= 50) {
lg = "D";
} else if (fg >= 0 && fg < 50) {
lg = "F";
}
students[i].lg=lg;
}
// here you need to sort
students.sort(function(a,b) {
if (a.fg > b.fg) return 1;
if (b.fg > a.fg) return -1;
return 0;
});
for (var i = 0; i < numStudents; i++) {
html += "<tr><td style='width:25px'>" + (i + 1) + "</td>";
html += "<td style='width:100px'>" + students[i].name + "</td>";
html += "<td style='width:100px'>" + students[i].att + "</td>";
html += "<td style='width:100px'>" + students[i].hw + "</td>";
html += "<td style='width:100px'>" + students[i].mdt + "</td>";
html += "<td style='width:100px'>" + students[i].fx + "</td>";
html += "<td style='width:100px'>" + students[i].fg + "</td>";
html += "<td style='width:100px'>" + students[i].lg + "</td></tr>";
}
html += "</table>";
var div = document.createElement("div");
div.innerHTML=html;
document.body.appendChild(div);