Question

如果我的标题听起来很混乱，我很抱歉，但我是编程的极端初学者。我的家庭作业是显示一个人每天工资加倍的天数（第1天：1.00美元，第2天：2.00美元，第3天：4.00美元等等）。我必须显示他们每天的工资以及他们所有日子的总工资。

我无法想象如何获得所有工作日所赚的所有工资的总和。帮助

for ( int daysWorked = 1; daysWorked <= numDaysWorked; daysWorked++) {
    System.out.println("Pay for day #" + daysWorked + ": " + formatter.format(amount));

    amount =  daysWorked * 2;

    totalPay = ?? ;
}
System.out.println("\nTOTAL PAY FOR " + numDaysWorked + " DAYS: " + formatter.format(totalPay));

Answer 1

       totalPay = ?? ;

应该是

       totalPay = totalPay + amount; // adding each day pay to totalPay

或以这样的简短形式书写：

       totalPay +=  amount; // adding each day pay to totalPay

你的逻辑是错误的，因为第一天的薪水也会加倍：

       amount =  daysWorked * 2;

你不想要的。所以你可以在for循环中添加一个if来纠正它：

for ( int daysWorked = 1; daysWorked <= numDaysWorked; daysWorked++) {

           System.out.println("Pay for day #" + daysWorked + ": " + formatter.format(amount));

           if(daysWorked == 1) {

              amount =  daysWorked 
           } else {

              amount =  daysWorked * 2;
           }
           totalPay +=  amount; // adding each day pay to totalPay 

         }

Answer 2

double amount = 1; // make sure it initially equals 1

for (int daysWorked = 1; daysWorked <= numDaysWorked; daysWorked++) {

    System.out.println("Pay for day #" + daysWorked + ": " + formatter.format(amount));

    totalPay += amount; // add the amount value each time to the totalPay variable
    amount *= 2; // it doubles so just double it every loop
}

System.out.println("\nTOTAL PAY FOR " + numDaysWorked + " DAYS: " + formatter.format(totalPay));

Java：获取变量输出的值的总和

2 个答案: