Need help creating a makefile(unix)

[celtik]

Basically this is what I want the makefile to do:

# Compile cpp2html.c to produce cpp2html.o.
# Run the command

flex cppscanner.l

to produce the file lex.yy.c from the language description in cppscanner.l.
# Compile lex.yy.c to produce lex.yy.o. (This often produces a warning message about extra tokens. Ignore it.)
# Link the the .o files to produce an executable program named cpp2html

Here is the current makefile I have and I was told the commands are not correct:

CC=gcc
cpp2html: cpp2html.o lex.yy.c lex.yy.o
$(CC) -o cpp2html cpp2html.o lex.yy.c lex.yy.o

cpp2html.o : cpp2html.c
$(CC) -c cpp2html.c

lex.yy.c: cppscanner.l
flex cppscanner.l

lex.yy.o : lex.yy.c
$(CC) -c lex.yy.c

I've also attached a text file with the error I receive.