用户如何选择一定数量的门票，然后询问每一张门票的奖品，从而得出一个总数？

Question

试驾制作一个程序，要求门票数量在1到5之间，然后我需要知道每一张票的奖品，让用户把它放进去。然后算出总数的总和。

    //kb = keyboard, t = tickets, val = prize, sm = sum tickets
    Scanner kb = new Scanner(System.in);
    int t = 0;
    double val = 0,sm = 0;

    //this is a loop just for know the ticket number.
    do {
        System.out.print("How many tickets do you have?[max 5]");

        while(!kb.hasNextInt()){
            kb.nextLine();
            System.out.println("This is not valid, try again.");                
        }
        t = kb.nextInt();
    } while ((t <= 0 || t >= 6));

问题或者我被困的地方就在这里。

    //With the for I can ask for the value of each ticket
    for (int i = 1; i<=t ;i++) {
        System.out.println("Ticket número "+i+" es de:");
        val = kb.nextDouble();
    }

我是如何把每一张票的不同奖品相加才能得到总金额的？

Answer 1

您可以完全删除val，只需直接将其相加：

for (int i = 1; i<=t ;i++) {
    System.out.println("Ticket número "+i+" es de:");
    sm += kb.nextDouble();
}

Answer 2

for (int i = 1; i<=t ;i++) {
    System.out.println("Ticket número "+i+" es de:");
    val = kb.nextDouble();
    sm = sm + val;
}