0_0_26655186_30942\Main.java:20: 错误: 需要')'
System.out.println(a + "+" b + "=" + a.add(b));
^
0_0_26655186_30942\Main.java:20: 错误: 不是语句
System.out.println(a + "+" b + "=" + a.add(b));
^
0_0_26655186_30942\Main.java:20: 错误: 需要';'
System.out.println(a + "+" b + "=" + a.add(b));
^
3 个错误
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