This problem is kind of fitting for my screen name...C Shell...CrazyShells....yeah Im done lol.

Anyhow Im trying to write a C Shell that prints a prompt, you enter the command into stdin, and it executes it yadda yadda yadda. I just want this shell to do only one thing for now...exit, lol. Thats it however I am having some issues that are just confusing the hell out of me. Im using flex to write this also and I get errors when I flex the file, and then when I try to gcc it.

	enum token_t (PROMT, COMMAND, END);

\n                      return PROMT;

[a-zA-Z0-9 ]+           return COMMAND;

exit                    return END;


int main(void)

           int tokentype;
           int running = 1;
           print("Enter a command.");

	while(running) {
                        tokentype = yylex();
                                   case COMMAND:
					 system(yytext); break;
                                   case END:
					 running = 0;
The errors are as follows:

flex error

"Shell.l", line 11: warning, rule cannot be matched

gcc error

Shell.l:2: parse error before `,'
Shell.l: In function `yylex':
Shell.l:6: `PROMT' undeclared (first use in this function)
Shell.l:6: (Each undeclared identifier is reported only once
Shell.l:6: for each function it appears in.)
Shell.l:9: `COMMAND' undeclared (first use in this function)
Shell.l:11: `END' undeclared (first use in this function)
Shell.l: In function `main':
Shell.l:29: `COMMAND' undeclared (first use in this function)
Shell.l:31: `END' undeclared (first use in this function)
Shell.l:30: warning: unreachable code at beginning of switch statement

See now what irks me about this is that END, and COMMAND are clearly(I hope atleast) defined in the rules section of the flex file same thing for promt. What could I possibly be doing wrong here?