View Compilation Error

0_0_30780568_32159.cpp:1:1: error: 'var' does not name a type
 var
 ^
0_0_30780568_32159.cpp:3:1: error: 'begin' does not name a type
 begin
 ^
0_0_30780568_32159.cpp:5:6: error: expected constructor, destructor, or type conversion before '(' token
 write(a+b);
      ^
0_0_30780568_32159.cpp:6:1: error: 'end' does not name a type
 end.
 ^