View Compilation Error

0_0_17354085_2034\Main.java:9: 错误: 可能尚未初始化变量n
                       for (int i = 0; i < n; i++) {
                                           ^
0_0_17354085_2034\Main.java:10: 错误: 可能尚未初始化变量mul
                mul = mul.multiply(r);
                      ^
0_0_17354085_2034\Main.java:10: 错误: 可能尚未初始化变量r
                mul = mul.multiply(r);
                                   ^
0_0_17354085_2034\Main.java:12: 错误: 可能尚未初始化变量mul
            String str = mul.stripTrailingZeros().toPlainString();
                         ^
4 个错误