Javascript - 无法获得要警报的数组的平均值

Question

我希望这对于专家来说会是一件非常简单的事情。因此，我的代码可以接收一些学生姓名及其各自的分数。到目前为止，一切都很好。但是，当它到达最后时，它应该将标记放在一起并找到平均值，然后向用户提醒平均值。但是，就目前情况而言，我没有收到任何警报。代码如下:

var sQuantity = parseInt(prompt("Let's begin compiling our student database. How many students would you like to enter?", "Number of Students")); 

var sList = new Array(); 
var sMarks = new Array(); 

for (var count = 0; count < sQuantity; count++) { 
    sList.push(prompt("Please enter the Student's Name", "Students Name")); 
} 

var i = 0; 

for (var count = 0; count < sQuantity; count++) { 
    sMarks.push(parseInt(prompt("Please enter " + sList[i] + "'s average grade for this course.", "Enter Average Grade"))); 
    var i=(i+1); 
} 

var sum = 0; 
var cAverage = 0; 

for (i = 0; i < sMarks.length; i++) { 
    sum = (sum + sMarks[i]); 
} 

cAverage = (Sum/sMarks.length); 

alert(cAverage); 

为什么代码没有在警报中显示平均值？

Answer 1

变量区分大小写，替换

cAverage = (Sum/sMarks.length); 

与

cAverage = (sum/sMarks.length); 

它有效

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