foo.cpp:13:26: warning: multi-character character constant [-Wmultichar]
       if i<>1 then write('x^',i) else write('x');
                          ^
foo.cpp:1:1: error: 'var' does not name a type
 var k,n,i:integer;
 ^
foo.cpp:2:6: error: found ':' in nested-name-specifier, expected '::'
     f:boolean;
      ^
foo.cpp:2:5: error: 'f' does not name a type
     f:boolean;
     ^
foo.cpp:3:1: error: 'begin' does not name a type
 begin
 ^
foo.cpp:5:3: error: 'f' does not name a type
   f:=true;
   ^
foo.cpp:6:3: error: expected unqualified-id before 'for'
   for i:=n downto 1 do
   ^
foo.cpp:9:7: error: expected unqualified-id before 'if'
       if k=0 then continue;
       ^
foo.cpp:10:7: error: expected unqualified-id before 'if'
       if (not f) and (k>0) then write('+');
       ^
foo.cpp:11:7: error: expected unqualified-id before 'if'
       if k<0 then write('-');
       ^
foo.cpp:12:7: error: expected unqualified-id before 'if'
       if abs(k)<>1 then write(abs(k));
       ^
foo.cpp:13:7: error: expected unqualified-id before 'if'
       if i<>1 then write('x^',i) else write('x');
       ^
foo.cpp:14:7: error: 'f' does not name a type
       f:=false;
       ^
foo.cpp:15:5: error: 'end' does not name a type
     end;
     ^
foo.cpp:16:9: error: expected constructor, destructor, or type conversion before '(' token
   readln(k);
         ^
foo.cpp:17:3: error: expected unqualified-id before 'if'
   if k<>0 then
   ^
foo.cpp:18:38: error: 'f' does not name a type
     if k>0 then begin writeln('+',k);f:=false; end
                                      ^
foo.cpp:18:48: error: 'end' does not name a type
     if k>0 then begin writeln('+',k);f:=false; end
                                                ^
foo.cpp:19:34: error: 'f' does not name a type
            else begin writeln(k);f:=false;end;
                                  ^
foo.cpp:19:43: error: 'end' does not name a type
            else begin writeln(k);f:=false;end;
                                           ^
foo.cpp:20:3: error: expected unqualified-id before 'if'
   if f then writeln('0');
   ^
foo.cpp:21:1: error: 'end' does not name a type
 end.
 ^