javascript - javascript 更改类名时出现逻辑错误

Question

这个脚本包含逻辑错误，在哪里？它只计算平均值。对于第一个数字，而不是第二个数字，依此类推...

window.onload = function() {
    var amountOfNumbers = 0;
    var total = 0;
    document.getElementById("uitkomst").innerHTML = "Er zijn nog geen cijfers ingevoerd";
    document.getElementById("cijfer").onblur = function() { 
        total = parseFloat(this.value);
        amountOfNumbers++;
        this.value = "";        
        document.getElementById("uitkomst").innerHTML = "Het gemiddelde van deze "+amountOfNumbers+" cijfers is "+(total/amountOfNumbers);
    }
};

Answer 1

您需要增加total而不是重置它。

total += parseFloat(this.value);
//    ^--- Add to the total

如果没有 +，total 将等于当前值，而不是所有数字的总和。