Java 求两个矩阵的布尔积

我的错误：

Exception in thread "main" java.lang.Error: Unresolved compilation problem: 
at BooleanProduct.main(BooleanProduct.java:4)

代码块

Multiple markers at this line
- B cannot be resolved to a (ln51)
 variable
- n cannot be resolved to a (ln53)
 variable
- A cannot be resolved to a (ln54)
 variable

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相应地缩进你的代码，检查它，然后在有特定问题时返回。尝试重新编译类。我确实有一个特定的问题。。。我需要帮助解决错误。你想让我说得更具体些吗？如果你正确地缩进了你的代码，你会在来到这里询问之前发现错误，这就是我要说的。听着，如果你想成为一个明智的人，甚至不必回答。大多数人都知道我有什么问题。也许我不是最好的程序员，我现在正在努力学习，我在学校。所以我只是不知道如何形成我的问题。

Multiple markers at this line
- B cannot be resolved to a (ln51)
 variable
- n cannot be resolved to a (ln53)
 variable
- A cannot be resolved to a (ln54)
 variable

int[][] C = booleanProduct(A, B, n);
{ // not necessary
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            System.out.print(C[i][j] + " ");
        }
        System.out.println("");
    }
} // not necessary

public static void main(String[] args) {
    // ...

    int[][] C = booleanProduct(A, B, n);
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            System.out.print(C[i][j] + " ");
        }
        System.out.println("");
    }
}