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View Compilation Error

0_0_35349375_6518\Main.java:2: 错误: 需要class, interface或enum
    public static void main(String[] args) {
                  ^
0_0_35349375_6518\Main.java:4: 错误: 需要class, interface或enum
        while (sc.hasNext()) {
        ^
0_0_35349375_6518\Main.java:6: 错误: 需要class, interface或enum
            double sum_cxd = 0;//总学分乘以绩点
            ^
0_0_35349375_6518\Main.java:7: 错误: 需要class, interface或enum
            int classes = sc.nextInt();
            ^
0_0_35349375_6518\Main.java:8: 错误: 需要class, interface或enum
            while (classes-- > 0) {
            ^
0_0_35349375_6518\Main.java:10: 错误: 需要class, interface或enum
                double p = sc.nextDouble();//成绩
                ^
0_0_35349375_6518\Main.java:11: 错误: 需要class, interface或enum
                if (p == -1)
                ^
0_0_35349375_6518\Main.java:13: 错误: 需要class, interface或enum
                sum_credits += s;
                ^
0_0_35349375_6518\Main.java:14: 错误: 需要class, interface或enum
                if (p >= 90)
                ^
0_0_35349375_6518\Main.java:16: 错误: 需要class, interface或enum
                if (p >= 80)
                ^
0_0_35349375_6518\Main.java:18: 错误: 需要class, interface或enum
                if (p >= 70)
                ^
0_0_35349375_6518\Main.java:20: 错误: 需要class, interface或enum
                if (p >= 60)
                ^
0_0_35349375_6518\Main.java:22: 错误: 需要class, interface或enum
                if (p >= 0)
                ^
0_0_35349375_6518\Main.java:24: 错误: 需要class, interface或enum
                sum_cxd += p * s;
                ^
0_0_35349375_6518\Main.java:25: 错误: 需要class, interface或enum
            }
            ^
0_0_35349375_6518\Main.java:28: 错误: 需要class, interface或enum
            } else {
            ^
0_0_35349375_6518\Main.java:30: 错误: 需要class, interface或enum
                System.out.println();
                ^
0_0_35349375_6518\Main.java:31: 错误: 需要class, interface或enum
            }
            ^
18 个错误


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