SQL & PL/SQL :: Changing Row Value As Column Head?

change my row value as column head. Here are my scripts:

Create table temp (code varchar2(3), head varchar2(4), value number(5));

insert into temp values('101','1101',500);
insert into temp values('101','1102',700);
insert into temp values('101','1103',600);
insert into temp values('102','1101',1000);
insert into temp values('102','1102',800);
insert into temp values('102','1103',900);
insert into temp values('103','1101',600);
insert into temp values('103','1102',400);
insert into temp values('103','1103',500);

select * from temp;

CODEHEADVALUE
1011101500
1011102700
1011103600
1021101100
1021102800
1021103900
1031101600
1031102400
1031103500

Now I like to get the above oputput as under:

Code 1101 1102 1103
101 500 700 600
102 100 800 900
103 600 400 500