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View Compilation Error

0_0_13347501_24474\Main.java:4: 找不到符号
符号: 构造函数 Scanner()
位置: 类 java.util.Scanner
				Scanner sc = new Scanner();
				             ^
0_0_13347501_24474\Main.java:6: 找不到符号
符号: 方法 nextInt()
位置: 类 Main
						int a=nextInt();
						      ^
0_0_13347501_24474\Main.java:7: 找不到符号
符号: 方法 nextInt()
位置: 类 Main
						int b=nextInt();
						      ^
3 错误


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