Javascript 我想不出我的程序出了什么问题_Javascript

Javascript 我想不出我的程序出了什么问题

javascript

Javascript 我想不出我的程序出了什么问题,javascript,Javascript,嘿，伙计们，当我运行这个程序时，它不会添加我的数字，基本上，我应该打印出销售最高的销售人员和最畅销的汽车。例如，当我在末尾为每辆车键入50 amount时，它会打印：0505050，而不是将其相加为200 function salesPerson(name, id, amount) { this.name = name; this.id = id; this.amount = amount; };

嘿，伙计们，当我运行这个程序时，它不会添加我的数字，基本上，我应该打印出销售最高的销售人员和最畅销的汽车。例如，当我在末尾为每辆车键入50 amount时，它会打印：0505050，而不是将其相加为200

function salesPerson(name, id, amount) {
            this.name = name;
            this.id = id;
            this.amount = amount;
        };


    //Create car array for each brand
        var Car = new Array(4);

        //Create array of salePersons
        var Person = new Array(2);

        //Every element in the array is a object type salesPerson
        for (var i = 0; i < Person.length; i++) {
            Person[i] = new salesPerson("", 0, 0);
        }

        var temp = 0;

        var m = 0;
        var a = 0;
        var p = 0;
        var b = 0;



        for(var i = 0; i < Person.length; i++){
           Person[i].name = prompt("Enter salesman name: ");
           Person[i].id = prompt("Enter salesman id: ");

           temp = prompt("Enter Mercedes-Benz amount: ");
           Person[i].amount += temp;
           m += temp;

           temp = prompt("Enter Audi amount: ");
           Person[i].amount += temp;
           a += temp;

           temp = prompt("Enter Porsche amount: ");
           Person[i].amount += temp;
           p += temp;

           temp = prompt("Enter BMW amount: ");
           Person[i].amount += temp;
           b += temp;

        }

        var max = 0;
        var name = "";

        for (var i = 0; i < Person.length; i++) {
            if (Person[i].amount > max) {
                max = Person[i].amount;
                name = Person[i].name;
            }
        }

        alert("The best salesperson of the month is " + name + ", with the sales amount of $" + max);

提示符的结果是一个字符串，因此+是串联的。一个非常粗糙的解决方法是只执行以下操作：

function salesPerson(name, id, amount) {
            this.name = name;
            this.id = id;
            this.amount = amount;
        };


    //Create car array for each brand
        var Car = new Array(4);

        //Create array of salePersons
        var Person = new Array(2);

        //Every element in the array is a object type salesPerson
        for (var i = 0; i < Person.length; i++) {
            Person[i] = new salesPerson("", 0, 0);
        }

        var temp = 0;

        var m = 0;
        var a = 0;
        var p = 0;
        var b = 0;



        for(var i = 0; i < Person.length; i++){
           Person[i].name = prompt("Enter salesman name: ");
           Person[i].id = prompt("Enter salesman id: ");

           temp = prompt("Enter Mercedes-Benz amount: ");
           Person[i].amount += temp;
           m += temp;

           temp = prompt("Enter Audi amount: ");
           Person[i].amount += temp;
           a += temp;

           temp = prompt("Enter Porsche amount: ");
           Person[i].amount += temp;
           p += temp;

           temp = prompt("Enter BMW amount: ");
           Person[i].amount += temp;
           b += temp;

        }

        var max = 0;
        var name = "";

        for (var i = 0; i < Person.length; i++) {
            if (Person[i].amount > max) {
                max = Person[i].amount;
                name = Person[i].name;
            }
        }

        alert("The best salesperson of the month is " + name + ", with the sales amount of $" + max);

temp = +prompt("Enter Mercedes-Benz amount: ");

其中+导致转换。请注意，这是非常粗糙的-它不做任何检查或错误处理。

您需要将temp转换为number；使用一元运算符+或parseInt

function salesPerson(name, id, amount) {
            this.name = name;
            this.id = id;
            this.amount = amount;
        };


    //Create car array for each brand
        var Car = new Array(4);

        //Create array of salePersons
        var Person = new Array(2);

        //Every element in the array is a object type salesPerson
        for (var i = 0; i < Person.length; i++) {
            Person[i] = new salesPerson("", 0, 0);
        }

        var temp = 0;

        var m = 0;
        var a = 0;
        var p = 0;
        var b = 0;



        for(var i = 0; i < Person.length; i++){
           Person[i].name = prompt("Enter salesman name: ");
           Person[i].id = prompt("Enter salesman id: ");

           temp = prompt("Enter Mercedes-Benz amount: ");
           Person[i].amount += temp;
           m += temp;

           temp = prompt("Enter Audi amount: ");
           Person[i].amount += temp;
           a += temp;

           temp = prompt("Enter Porsche amount: ");
           Person[i].amount += temp;
           p += temp;

           temp = prompt("Enter BMW amount: ");
           Person[i].amount += temp;
           b += temp;

        }

        var max = 0;
        var name = "";

        for (var i = 0; i < Person.length; i++) {
            if (Person[i].amount > max) {
                max = Person[i].amount;
                name = Person[i].name;
            }
        }

        alert("The best salesperson of the month is " + name + ", with the sales amount of $" + max);

 for(var i = 0; i < Person.length; i++){
           Person[i].name = prompt("Enter salesman name: ");
           Person[i].id = prompt("Enter salesman id: ");

           temp = +prompt("Enter Mercedes-Benz amount: ");
           Person[i].amount += temp;
           m += temp;

           temp = +prompt("Enter Audi amount: ");
           Person[i].amount += temp;
           a += temp;

           temp = +prompt("Enter Porsche amount: ");
           Person[i].amount += temp;
           p += temp;

           temp = +prompt("Enter BMW amount: ");
           Person[i].amount += temp;
           b += temp;

        }

在将解析字符串添加为整数之前工作

function salesPerson(name, id, amount) {
            this.name = name;
            this.id = id;
            this.amount = amount;
        };


    //Create car array for each brand
        var Car = new Array(4);

        //Create array of salePersons
        var Person = new Array(2);

        //Every element in the array is a object type salesPerson
        for (var i = 0; i < Person.length; i++) {
            Person[i] = new salesPerson("", 0, 0);
        }

        var temp = 0;

        var m = 0;
        var a = 0;
        var p = 0;
        var b = 0;



        for(var i = 0; i < Person.length; i++){
           Person[i].name = prompt("Enter salesman name: ");
           Person[i].id = prompt("Enter salesman id: ");

           temp = prompt("Enter Mercedes-Benz amount: ");
           Person[i].amount += temp;
           m += temp;

           temp = prompt("Enter Audi amount: ");
           Person[i].amount += temp;
           a += temp;

           temp = prompt("Enter Porsche amount: ");
           Person[i].amount += temp;
           p += temp;

           temp = prompt("Enter BMW amount: ");
           Person[i].amount += temp;
           b += temp;

        }

        var max = 0;
        var name = "";

        for (var i = 0; i < Person.length; i++) {
            if (Person[i].amount > max) {
                max = Person[i].amount;
                name = Person[i].name;
            }
        }

        alert("The best salesperson of the month is " + name + ", with the sales amount of $" + max);

职能销售人员姓名、id、金额{ this.name=名称； this.id=id；这个。金额=金额； }; //为每个品牌创建汽车阵列 var Car=新阵列4； //创建销售人员数组 var Person=新阵列2； //数组中的每个元素都是对象类型对于var i=0；i最大值{ max=人[i]。金额；姓名=人[i]。姓名； } }

Alert本月最佳销售人员为+name+，销售金额为$+max 当您从用户获取输入时，它将作为字符串接收。您需要将此输入转换为整数。这可以通过使用parseIntvalue、基数来完成。要了解关于parseInt函数的更多信息，请参见javascript中的

，0+50=050和0+parseInt50=50，我猜它是作为字符串出现的。因此，当您添加“0”+“50”+“50”+“50”+“50”时，您会得到“0505050”，为什么不在结果上使用parseInt呢？他将其存储为tempparseInt，只要使用+就可以了。ParseInt具有检测无效字符的优势我有一个名为function->isNegativenum{if num<0{alertTry，数量为正数！；返回false；}返回true；}；我用它来验证上面的金额，但是如果我输入两位数字，程序就结束了

function salesPerson(name, id, amount) {
            this.name = name;
            this.id = id;
            this.amount = amount;
        };


    //Create car array for each brand
        var Car = new Array(4);

        //Create array of salePersons
        var Person = new Array(2);

        //Every element in the array is a object type salesPerson
        for (var i = 0; i < Person.length; i++) {
            Person[i] = new salesPerson("", 0, 0);
        }

        var temp = 0;

        var m = 0;
        var a = 0;
        var p = 0;
        var b = 0;



        for(var i = 0; i < Person.length; i++){
           Person[i].name = prompt("Enter salesman name: ");
           Person[i].id = prompt("Enter salesman id: ");

           temp = prompt("Enter Mercedes-Benz amount: ");
           Person[i].amount += temp;
           m += temp;

           temp = prompt("Enter Audi amount: ");
           Person[i].amount += temp;
           a += temp;

           temp = prompt("Enter Porsche amount: ");
           Person[i].amount += temp;
           p += temp;

           temp = prompt("Enter BMW amount: ");
           Person[i].amount += temp;
           b += temp;

        }

        var max = 0;
        var name = "";

        for (var i = 0; i < Person.length; i++) {
            if (Person[i].amount > max) {
                max = Person[i].amount;
                name = Person[i].name;
            }
        }

        alert("The best salesperson of the month is " + name + ", with the sales amount of $" + max);