View Compilation Error

598022_0_0_24696\Main.java:1: 需要 "class" 或 "interface"
program  eg;
^
598022_0_0_24696\Main.java:2: 需要 "class" 或 "interface"
var  a,b,s:integer;
^
598022_0_0_24696\Main.java:3: 需要 "class" 或 "interface"
begin
^
598022_0_0_24696\Main.java:7: 需要 "class" 或 "interface"
  s:=a+b;
  ^
598022_0_0_24696\Main.java:8: 需要 "class" 或 "interface"
  writeln(s);
  ^
598022_0_0_24696\Main.java:9: 需要 "class" 或 "interface"
  writeln;
  ^
598022_0_0_24696\Main.java:10: 需要 "class" 或 "interface"
end;
^
598022_0_0_24696\Main.java:12: 需要 "class" 或 "interface"
end.
^
8 错误