JavaScript如何将数组插入表中
我想知道如何将这个数组插入到表中。这是我的密码;我希望它显示如下:JavaScript如何将数组插入表中,javascript,arrays,Javascript,Arrays,我想知道如何将这个数组插入到表中。这是我的密码;我希望它显示如下: var body = document.getElementsByTagName('body')[0]; var table = document.createElement('table'); var tr = document.createElement('tr'); var td = document.createElement('td'); td.nodeValue = someDataToDisplayInTheCel
var body = document.getElementsByTagName('body')[0];
var table = document.createElement('table');
var tr = document.createElement('tr');
var td = document.createElement('td');
td.nodeValue = someDataToDisplayInTheCell;
tr.appendChild(td);
table.appendChild(tr);
body.appendChild(body);
学生姓名学生分数学生成绩
如果有人知道怎么做,我们将不胜感激
var gradeAwarded;
var max;
var A =0;
var B =0;
var C=0;
var F=0;
var Sum = 0
var average
var repeat, studentArr = [], markArr = [];
while (repeat !== 'n'){
studentArr.push(prompt("Enter Student Name: ", "Ross"));
markArr.push(parseInt (prompt("Enter Student mark: ", 50)));
if (markArr <0 || markArr >100){
alert("Grate out of bounds");
}else if (markArr >= 83){
gradeAwarded = "A";
A = A + 1;
}else if (markArr >= 70){
gradeAwarded = "B";
B = B+1;
}else if (markArr >= 50){
gradeAwarded = "C";
C = C+1;
}else if (markArr >= 0){
gradeAwarded = "F";
F = F+1;
}
repeat = prompt ("Do you want to enter another student: y/n");
}
Array.prototype.max = function() {
return Math.max.apply(Math, markArr);
};
Array.prototype.min = function() {
return Math.min.apply(Math, markArr);
};
for(var x = 0; x < markArr.length; x ++)
{
Sum = Sum + markArr[x];
}
average = Sum / markArr.length;
var min = markArr.min();
var max = markArr.max();
for(var i = 0; i < markArr.length; i++)
document.write(<tr> markArr[i] </tr>);
document.write("The Highest mark was : "+max+"<br>");
document.write("The Lowest mark was : "+min +"<br>");
document.write("The Average mark was : "+average+"<br>");
document.write("number A grades : "+A+"<br>");
document.write("number B grades : "+B+"<br>");
document.write("number C grades : "+C+"<br>");
document.write("number F grades : "+F+"<br>");
var;
var-max;
var A=0;
var B=0;
var C=0;
var F=0;
var总和=0
var平均值
变量重复,studentArr=[],markArr=[];
同时(重复!='n'){
推送(提示(“输入学生姓名:”,“罗斯”);
markArr.push(parseInt(提示(“输入学生标记:”,50));
如果(markArr 100){
警惕(“超出界限”);
}否则如果(markArr>=83){
grade=“A”;
A=A+1;
}否则如果(markArr>=70){
grade=“B”;
B=B+1;
}否则如果(markArr>=50){
grade=“C”;
C=C+1;
}否则如果(markArr>=0){
grade=“F”;
F=F+1;
}
repeat=提示(“您想输入另一个学生:是/否”);
}
Array.prototype.max=函数(){
返回Math.max.apply(Math,markArr);
};
Array.prototype.min=函数(){
返回Math.min.apply(Math,markArr);
};
对于(变量x=0;x”);
文件。书写(“最低分数为:“+min+”
”;
文件。书写(“平均分数为:“+Average+”
”;
文件。写下(“数字A等级:+A+”
”;
文件。填写(“B级编号:“+B+”
”);
文件。写下(“C等级编号:“+C+”
”);
文件。填写(“F等级编号:+F+”
”;
如果您想纯粹从javascript创建表,有如下函数:
var body = document.getElementsByTagName('body')[0];
var table = document.createElement('table');
var tr = document.createElement('tr');
var td = document.createElement('td');
td.nodeValue = someDataToDisplayInTheCell;
tr.appendChild(td);
table.appendChild(tr);
body.appendChild(body);
试着看看这个:
从数组创建表的方法有很多。试试下面的代码
<script>
var gradeAwarded;
var max;
var A =0;
var B =0;
var C=0;
var F=0;
var Sum = 0
var average
var repeat, studentArr = [], markArr = [];
while (repeat !== 'n'){
studentArr.push(prompt("Enter Student Name: ", "Ross"));
markArr.push(parseInt (prompt("Enter Student mark: ", 50)));
if (markArr <0 || markArr >100){
alert("Grate out of bounds");
}else if (markArr >= 83){
gradeAwarded = "A";
A = A + 1;
}else if (markArr >= 70){
gradeAwarded = "B";
B = B+1;
}else if (markArr >= 50){
gradeAwarded = "C";
C = C+1;
}else if (markArr >= 0){
gradeAwarded = "F";
F = F+1;
}
repeat = prompt ("Do you want to enter another student: y/n");
}
Array.prototype.max = function() {
return Math.max.apply(Math, markArr);
};
Array.prototype.min = function() {
return Math.min.apply(Math, markArr);
};
for(var x = 0; x < markArr.length; x ++)
{
Sum = Sum + markArr[x];
}
average = Sum / markArr.length;
var min = markArr.min();
var max = markArr.max();
document.write("<table>");
for(var i = 0; i < markArr.length; i++){
document.write("<tr>");
document.write("<td>"+ studentArr[i] + '</td>');
document.write("<td>"+ markArr[i] + '</td>');
if (markArr[i] >= 83){
gradeAwarded = "A";
}else if (markArr[i] >= 70){
gradeAwarded = "B";
}else if (markArr[i] >= 50){
gradeAwarded = "C";
}else if (markArr[i] >= 0){
gradeAwarded = "F";
}
document.write("<td>"+ gradeAwarded + '</td>');
}
document.write("</table>");
document.write("The Highest mark was : "+max+"<br>");
document.write("The Lowest mark was : "+min +"<br>");
document.write("The Average mark was : "+average+"<br>");
document.write("number A grades : "+A+"<br>");
document.write("number B grades : "+B+"<br>");
document.write("number C grades : "+C+"<br>");
document.write("number F grades : "+F+"<br>");
</script>
已颁发的var等级;
var-max;
var A=0;
var B=0;
var C=0;
var F=0;
var总和=0
var平均值
变量重复,studentArr=[],markArr=[];
同时(重复!='n'){
推送(提示(“输入学生姓名:”,“罗斯”);
markArr.push(parseInt(提示(“输入学生标记:”,50));
如果(markArr 100){
警惕(“超出界限”);
}否则如果(markArr>=83){
grade=“A”;
A=A+1;
}否则如果(markArr>=70){
grade=“B”;
B=B+1;
}否则如果(markArr>=50){
grade=“C”;
C=C+1;
}否则如果(markArr>=0){
grade=“F”;
F=F+1;
}
repeat=提示(“您想输入另一个学生:是/否”);
}
Array.prototype.max=函数(){
返回Math.max.apply(Math,markArr);
};
Array.prototype.min=函数(){
返回Math.min.apply(Math,markArr);
};
对于(变量x=0;x=83){
grade=“A”;
}否则如果(markArr[i]>=70){
grade=“B”;
}否则如果(markArr[i]>=50){
grade=“C”;
}else如果(markArr[i]>=0){
grade=“F”;
}
文件。填写(“+”+”);
}
文件。填写(“”);
document.write(“最高分数为:“+max+”
”);
文件。书写(“最低分数为:“+min+”
”;
文件。书写(“平均分数为:“+Average+”
”;
文件。写下(“数字A等级:+A+”
”;
文件。填写(“B级编号:“+B+”
”);
文件。写下(“C等级编号:“+C+”
”);
文件。填写(“F等级编号:+F+”
”;
希望这有帮助
var markAwarded;
var gradeAwarded;
var max;
var A = 0;
var B = 0;
var C = 0;
var F = 0;
var Sum = 0
var average
var repeat, studentArr = [], markArr = [], gradeArr = [];
while (repeat !== 'n') {
studentArr.push(prompt("Enter Student Name: ", "Ross"));
markAwarded = parseInt(prompt("Enter Student mark: ", 50));
markArr.push(markAwarded);
if (markAwarded < 0 || markAwarded > 100) {
alert("Grate out of bounds");
} else if (markAwarded >= 83) {
gradeAwarded = "A";
A = A + 1;
} else if (markAwarded >= 70) {
gradeAwarded = "B";
B = B + 1;
} else if (markAwarded >= 50) {
gradeAwarded = "C";
C = C + 1;
} else if (markAwarded >= 0) {
gradeAwarded = "F";
F = F + 1;
}
gradeArr.push(gradeAwarded);
repeat = prompt("Do you want to enter another student: y/n");
}
Array.prototype.max = function () {
return Math.max.apply(Math, markArr);
};
Array.prototype.min = function () {
return Math.min.apply(Math, markArr);
};
for (var x = 0; x < markArr.length; x++) {
Sum = Sum + markArr[x];
}
average = Sum / markArr.length;
var min = markArr.min();
var max = markArr.max();
document.write("<table style='border:1px solid black;'><tr><th>Student Name</th><th>Student Mark</th><th>Student Grade </th></tr>");
for (var i = 0; i < markArr.length; i++) {
document.write("<tr><td>" + studentArr[i] + "</td><td>" + markArr[i] + "</td><td>" + gradeArr[i] + "</td> </tr>");
}
document.write("</table>");
document.write("The Highest mark was : " + max + "<br>");
document.write("The Lowest mark was : " + min + "<br>");
document.write("The Average mark was : " + average + "<br>");
document.write("number A grades : " + A + "<br>");
document.write("number B grades : " + B + "<br>");
document.write("number C grades : " + C + "<br>");
document.write("number F grades : " + F + "<br>");
var;
已颁发的var等级;
var-max;
var A=0;
var B=0;
var C=0;
var F=0;
var总和=0
var平均值
变量重复,studentArr=[],markArr=[],gradeArr=[];
同时(重复!='n'){
推送(提示(“输入学生姓名:”,“罗斯”);
MarkDewarded=parseInt(提示(“输入学生分数:”,50));
markArr.push(markArr.push);
如果(中标分数<0 | |中标分数>100){
警惕(“超出界限”);
}否则如果(标记>=83){
grade=“A”;
A=A+1;
}否则,如果(标记>=70){
grade=“B”;
B=B+1;
}否则,如果(标记>=50){
grade=“C”;
C=C+1;
}否则如果(标记>=0){
grade=“F”;
F=F+1;
}
成绩推送(成绩授予);
repeat=提示(“您想输入另一个学生:是/否”);
}
Array.prototype.max=函数(){
返回Math.max.apply(Math,markArr);
};
Array.prototype.min=函数(){
返回Math.min.apply(Math,markArr);
};
对于(变量x=0;x