View Compilation Error

0_0_13139031_28527.cpp:1:1: error: 'var' does not name a type
 var a,b:longint; 
 ^
0_0_13139031_28527.cpp:2:1: error: 'begin' does not name a type
 begin
 ^
0_0_13139031_28527.cpp:6:14: error: expected constructor, destructor, or type conversion before '(' token
       writeln(a+b);
              ^
0_0_13139031_28527.cpp:7:5: error: 'end' does not name a type
     end;
     ^
0_0_13139031_28527.cpp:8:1: error: 'end' does not name a type
 end.
 ^