0_0_1942152_3828\Main.java:21: 未结束的字符字面值
System.out.println(a.toString()+' + '+b.toString()+' = '+c.toString());
^
0_0_1942152_3828\Main.java:21: 未结束的字符字面值
System.out.println(a.toString()+' + '+b.toString()+' = '+c.toString());
^
0_0_1942152_3828\Main.java:21: 不是语句
System.out.println(a.toString()+' + '+b.toString()+' = '+c.toString());
^
0_0_1942152_3828\Main.java:21: 未结束的字符字面值
System.out.println(a.toString()+' + '+b.toString()+' = '+c.toString());
^
0_0_1942152_3828\Main.java:21: 不是语句
System.out.println(a.toString()+' + '+b.toString()+' = '+c.toString());
^
0_0_1942152_3828\Main.java:21: 非法的表达式开始
System.out.println(a.toString()+' + '+b.toString()+' = '+c.toString());
^
0_0_1942152_3828\Main.java:21: 未结束的字符字面值
System.out.println(a.toString()+' + '+b.toString()+' = '+c.toString());
^
0_0_1942152_3828\Main.java:21: 需要 ';'
System.out.println(a.toString()+' + '+b.toString()+' = '+c.toString());
^
8 错误
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