Question

所以我对Java很陌生，几个月前才开始为一门课程编程。我完全和完全坚持这个项目。 This is the project.

到目前为止，这是我的代码。

double mile;
double gas;
int week;
double mpg;
double totalMile; 
double totalGas;




week = 0;
gas = 0;
mile = 0;
totalMile = 0;
totalGas = 0;

Scanner reply = new Scanner(System.in);

System.out.println("Please enter the amount of miles.");
mile = reply.nextDouble();



while(mile != -99)
{
    week++;



    System.out.println("Please enter the amount of gas (in gallons) purchased for this week.");
    gas = reply.nextDouble();
    mpg = mile / gas;



    System.out.println("Week: "+week+"");
    System.out.println("Miles: "+mile+" Vacation Miles Traveled: "+totalMile+"");
    System.out.println("Gallons: "+gas+" Vacation Gallons Purchased: "+totalGas+"");        
    System.out.println("MPG: "+mpg+"");

    System.out.println("Please enter the amount of miles.");
    mile = reply.nextDouble();


}

我真正坚持的唯一部分是如何获得“假期里程/气体”值，我不知道如何在while循环中添加相同的变量。

Answer 1

假设您尝试保持总计，请尝试totalmile += reply.nextDouble();

What this does是totalmile = totalmile + reply.nextDouble（）;

Answer 2

我假设您想要记录从一开始就驾驶的所有里程？

为什么不在while循环中使用总里程或总加仑变量？

totalmile += mile
totalgas += gas

您可能还想移动

System.out.println("Please enter the amount of miles.");
mile = reply.nextDouble();

所以你的代码看起来像是：

week++;

System.out.println("Please enter the amount of gas (in gallons) purchased for this week.");
gas = reply.nextDouble();
mpg = mile / gas;

System.out.println("Please enter the amount of miles.");
mile = reply.nextDouble();

totalgas += gas
totalmiles += mile

System.out.println("Week: "+week+"");
System.out.println("Miles: "+mile+" Vacation Miles Traveled: "+totalmile+"");
System.out.println("Gallons: "+gas+" Vacation Gallons Purchased: "+totalgas+"");        
System.out.println("MPG: "+mpg+"");

所以是的。祝你的编程工作顺利！

在while循环中，如何将过去循环中的变量添加到当前循环中的同一变量

2 个答案: