View Compilation Error

0_0_15515743_22316.cpp:1:1: error: 'var' does not name a type
 var a:real;
 ^
0_0_15515743_22316.cpp:2:1: error: 'begin' does not name a type
 begin
 ^
0_0_15515743_22316.cpp:5:10: error: expected constructor, destructor, or type conversion before '(' token
     write(abs(a-0):0:2);
          ^
0_0_15515743_22316.cpp:6:3: error: 'end' does not name a type
   end;
   ^
0_0_15515743_22316.cpp:7:1: error: 'end' does not name a type
 end.
 ^