View Compilation Error

0_0_18673139_3318\Main.java:3: 错误: 需要class, interface或enum
Scanner sc=new Scanner(System.in);
^
0_0_18673139_3318\Main.java:4: 错误: 需要class, interface或enum
int a,b;
^
0_0_18673139_3318\Main.java:5: 错误: 需要class, interface或enum
a=sc.nextInt();
^
0_0_18673139_3318\Main.java:6: 错误: 需要class, interface或enum
b=sc.nextInt();
^
0_0_18673139_3318\Main.java:7: 错误: 需要class, interface或enum
System.out.println(a+b);
^
0_0_18673139_3318\Main.java:8: 错误: 需要class, interface或enum
}
^
6 个错误