View Compilation Error

0_0_18946984_25722.cpp:1:1: error: 'var' does not name a type
 var a,b:int64;
 ^
0_0_18946984_25722.cpp:2:1: error: 'begin' does not name a type
 begin
 ^
0_0_18946984_25722.cpp:4:8: error: expected constructor, destructor, or type conversion before '(' token
 writeln(a+b);
        ^
0_0_18946984_25722.cpp:5:1: error: 'end' does not name a type
 end.
 ^