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View Compilation Error

0_0_39749362_28511\Main.java:2: 错误: 非法的类型开始
public:
      ^
0_0_39749362_28511\Main.java:2: 错误: 需要';'
public:
       ^
0_0_39749362_28511\Main.java:3: 错误: 方法声明无效; 需要返回类型
    int calculate(string s) {
        ^
3 个错误


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