View Compilation Error

0_0_18843947_25020.cpp:1:1: error: 'var' does not name a type
 var a,b:longint;
 ^
0_0_18843947_25020.cpp:2:1: error: 'begin' does not name a type
 begin
 ^
0_0_18843947_25020.cpp:4:12: error: expected constructor, destructor, or type conversion before '(' token
     writeln(a+b);
            ^
0_0_18843947_25020.cpp:5:1: error: 'end' does not name a type
 end.
 ^