为什么我不能在for循环中打印这个变量？[副本]

Question

import java.util.*;

class test2 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int N = sc.nextInt();
        
        int[] incomes = new int[N];
        for (int i = 0; i < N; i++) {
            incomes[i] = sc.nextInt();
        }
        System.out.println(Arrays.toString(incomes));

        int[] taxes = new int[N];
        for (int i = 0; i < N; i++) {
            taxes[i] = sc.nextInt();
        }
        System.out.println(Arrays.toString(taxes));

        int[] payed = new int[N];

        for (int i = 0; i < N; i++) {
            payed[i] = incomes[i] * taxes[i];
        }
        System.out.println(Arrays.toString(payed));

        int max = payed[0];

        for (int i = 1; i < N; i++) {
            if (payed[i] > max) {
                max = payed[i];
                int count = i;
            }
        }
        System.out.println("Max is " + count);
    }
}

我可以打印最大罚款，但我不能打印计数。我看不出max和count之间的区别，也看不出为什么它不让我打印count。感谢任何帮助

Answer 1

count变量是在循环内部定义的。您需要在循环之前定义它，以便在循环之后可以访问它。

int count = 0;
for (int i = 1; i < N; i++) {
    if (payed[i] > max) {
        max = payed[i];
        count = i;
    }
}
System.out.println("Max is " + count);

此外，您可能需要count++而不是count=i；