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View Compilation Error

0_0_14996587_19253\Main.java:5: 错误: 找不到符号
    while(sc.hasNext){
            ^
  符号:   变量 hasNext
  位置: 类型为Scanner的变量 sc
0_0_14996587_19253\Main.java:5: 错误: 非法的类型开始
    while(sc.hasNext){
         ^
0_0_14996587_19253\Main.java:8: 错误: 找不到符号
      string str="";
      ^
  符号:   类 string
  位置: 类 Main
3 个错误


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