View Compilation Error

0_0_29516048_24723\Main.java:1: 错误: 需要class, interface或enum
public static void main(String args[]){
              ^
0_0_29516048_24723\Main.java:3: 错误: 需要class, interface或enum
		BigDecimal a,b,c;
		^
0_0_29516048_24723\Main.java:4: 错误: 需要class, interface或enum
		while(sc.hasNext()){
		^
0_0_29516048_24723\Main.java:6: 错误: 需要class, interface或enum
			b=sc.nextBigDecimal();
			^
0_0_29516048_24723\Main.java:7: 错误: 需要class, interface或enum
			c=a.add(b);
			^
0_0_29516048_24723\Main.java:8: 错误: 需要class, interface或enum
			System.out.println(c);
			^
0_0_29516048_24723\Main.java:9: 错误: 需要class, interface或enum
		}
		^
7 个错误