java - 我需要帮助让用户输入 10 种货币而不是 1 种

Question

我得到了下面的代码，当用户从键盘输入 1-5 时，它会将英镑转换为选定的货币之一。目前它需要 1 个用户输入并将其转换，但我也需要它需要 10 个用户输入并将所有 10 个都转换为用户选择的货币。我相信需要一个 for 循环，例如

for( int i = 0; i < 10; i++ )

是需要的。谁能帮忙吗？

这是我到目前为止的代码:

public class test {
    public static void main(String[] args) {
        currency();
    }

    public static void currency(){
        int input;



        @SuppressWarnings("resource")
        Scanner keyboard = new Scanner(System.in);


        System.out.println("1. Euros");
        System.out.println("2. USD ");
        System.out.println("3. Yen");
        System.out.println("4. Rupees");
        System.out.println("5. Exit ?");

        input = keyboard.nextInt();

        if(input == 1){
            float XEUR = (float) 1.19;
            System.out.println("Enter 10 GBP values to be converted to EUR:");
            System.out.println("EUR: " + keyboard.nextFloat() * XEUR);

    }else if(input == 2){
            float XUSD = (float) 1.26;
            System.out.println("Enter 10 GBP values to be converted to USD:");
            System.out.println("USD: " + keyboard.nextFloat() * XUSD);

        } else if (input == 3){
            float XYEN = (float) 145.02;
            System.out.println("Enter 10 GBP values to be converted to Yen:");
            System.out.println("YEN: " + keyboard.nextFloat() * XYEN);

        }else if(input == 4){
                float XRUP = (float) 84.86;
                System.out.println("Enter 10 GBP values to be converted to Rupees:");
                System.out.println("USD: " + keyboard.nextFloat() * XRUP);
        }else if(input == 5){
                    System.out.println("Exiting");

      }
    }   
}

Answer 1

您可以将所有输入存储在数组中并进行如下处理:

int input = keyboard.nextInt();
if (input < 1 || input > 5) {
    System.out.println("Invalid input");
    return;
}
if (input == 5) {
    System.out.println("Exiting");
    return;
}
float[] vals = new float[10];
for(int i=0; i<10;i++) {
    System.out.println("Enter "+ (i+1) +" value");
    vals[i] = keyboard.nextFloat();
}

switch(input) {
    case 1:
        // process the vals in loop:
        for(int v : vals) {
            // do conversion here
        }
        break;
    // handle other cases
}