View Compilation Error

0_0_17827634_16184.cpp:1:1: error: 'var' does not name a type
 var
 ^
0_0_17827634_16184.cpp:3:1: error: 'function' does not name a type
 function w(a,b,c:longint):longint;
 ^
0_0_17827634_16184.cpp:4:1: error: 'begin' does not name a type
 begin
 ^
0_0_17827634_16184.cpp:14:1: error: 'end' does not name a type
 end;
 ^
0_0_17827634_16184.cpp:16:1: error: 'begin' does not name a type
 begin
 ^
0_0_17827634_16184.cpp:20:12: error: expected constructor, destructor, or type conversion before '(' token
       write('w','(',a1,',',b1,',',c1,')=');
            ^
0_0_17827634_16184.cpp:21:14: error: expected constructor, destructor, or type conversion before '(' token
       writeln(w(a1,b1,c1));
              ^
0_0_17827634_16184.cpp:22:5: error: 'end' does not name a type
     end;
     ^
0_0_17827634_16184.cpp:23:1: error: 'end' does not name a type
 end.
 ^