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View Compilation Error

0_0_34295454_675\Main.java:6: 错误: 找不到符号
        while(in.hasNextDouble){
                ^
  符号:   变量 hasNextDouble
  位置: 类型为Scanner的变量 in
0_0_34295454_675\Main.java:6: 错误: 非法的类型开始
        while(in.hasNextDouble){
             ^
0_0_34295454_675\Main.java:12: 错误: 程序包system不存在
             system.out.println(String.format("%.2f",s));
                   ^
3 个错误


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