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View Compilation Error

0_0_39740920_11470\Main.java:58: 错误: 非法的表达式开始
        return switch (op) {
               ^
0_0_39740920_11470\Main.java:58: 错误: 不是语句
        return switch (op) {
                      ^
0_0_39740920_11470\Main.java:58: 错误: 需要';'
        return switch (op) {
                          ^
0_0_39740920_11470\Main.java:59: 错误: 孤立的case
            case "+" -> num1 + num2;
            ^
0_0_39740920_11470\Main.java:59: 错误: 需要:
            case "+" -> num1 + num2;
                    ^
0_0_39740920_11470\Main.java:59: 错误: 非法的表达式开始
            case "+" -> num1 + num2;
                     ^
0_0_39740920_11470\Main.java:59: 错误: 需要';'
            case "+" -> num1 + num2;
                            ^
0_0_39740920_11470\Main.java:59: 错误: 不是语句
            case "+" -> num1 + num2;
                               ^
0_0_39740920_11470\Main.java:60: 错误: 需要:
            case "-" -> num2 - num1;
                    ^
0_0_39740920_11470\Main.java:60: 错误: 非法的表达式开始
            case "-" -> num2 - num1;
                     ^
0_0_39740920_11470\Main.java:60: 错误: 需要';'
            case "-" -> num2 - num1;
                            ^
0_0_39740920_11470\Main.java:60: 错误: 不是语句
            case "-" -> num2 - num1;
                               ^
0_0_39740920_11470\Main.java:61: 错误: 需要:
            case "*" -> num1 * num2;
                    ^
0_0_39740920_11470\Main.java:61: 错误: 非法的表达式开始
            case "*" -> num1 * num2;
                     ^
0_0_39740920_11470\Main.java:61: 错误: 需要';'
            case "*" -> num1 * num2;
                            ^
0_0_39740920_11470\Main.java:61: 错误: 不是语句
            case "*" -> num1 * num2;
                               ^
0_0_39740920_11470\Main.java:62: 错误: 需要:
            case "/" -> num2 / num1;
                    ^
0_0_39740920_11470\Main.java:62: 错误: 非法的表达式开始
            case "/" -> num2 / num1;
                     ^
0_0_39740920_11470\Main.java:62: 错误: 需要';'
            case "/" -> num2 / num1;
                            ^
0_0_39740920_11470\Main.java:62: 错误: 不是语句
            case "/" -> num2 / num1;
                               ^
0_0_39740920_11470\Main.java:63: 错误: 需要:
            default -> 0;
                   ^
0_0_39740920_11470\Main.java:63: 错误: 非法的表达式开始
            default -> 0;
                    ^
0_0_39740920_11470\Main.java:63: 错误: 需要';'
            default -> 0;
                      ^
23 个错误


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