Help doing an e-mail program in c...

[Tyler_Durden]

I have to do an email program for a homework assignment...here I give you what I have made so far..
ok..so what I did until now is this...
the main file is this one:
------------------------------(progmail.c)----

#include <stdio.h>    /* para funcoes como printf, scanf, etc */
#include <stdlib.h>   /* para a funcao exit */ 
#include <string.h>   /* para funcoes relacionadas com strings */
#define DIMMAIN 20

void comandom(void);
void comandoC(void);
void comandoL(void);

int help(){
  
  printf ("Help \n \n");
  printf ("Mail Commands \n \n");
  
 
printf("------------------------------------------------------------------------\n");
  printf("|   t     <message list> type messages                          
      |\n");
  printf("|   d     <message list> delete messages                        
      |\n");
  printf("|   R     <message list> reply to message senders               
      |\n");
  printf("|   r     <message list> reply to message senders and all
recipients   |\n");
  printf("|   m     <user list> mail to specific users                    
      |\n");
  printf("|   q          quit, saving unresolved messages in mbox         
      |\n");
  printf("|   x          quit, do not remove system mailbox               
      |\n");
  printf("|   h          print out active message headers                 
      |\n");
 
printf("------------------------------------------------------------------------\n");
  
  return 0;
  
}



int main (){
  char c;
  
  fopen("mail.txt","r");
  
  printf("E-mail program.\n");
  
  
  do{
    putchar ('&');
    scanf("%s",&c);
    
    
    switch (c)
      {
      case '?':help();break;
      case 't':printf("ok\n");break;
      case 'd':printf("ok\n");break;
      case 'R':printf("ok\n");break;
      case 'r':printf("ok\n");break;
      case 'm':comandom();break;
      case 'q':printf("ok\n");break;
      case 'x':printf("Program shutting down!\n"); break; 
      case 'h':printf("ok\n");break;
      case 'C':comandoC();break;
      case 'L':comandoL();break;
      default: printf("Unknown command!\n");break;
      } 

      }while (c!='x');
  
    return 0;
  }

---------------------------------

my "m" command, which is supposed to ask you for the email informations is
this one:
----------------/comandom.c-----------

#include <stdio.h>

typedef struct mail
{
  char from[120];
  char to[120];
  char sub[120];
  char msg[120];
} MAIL;

void comandom(MAIL *ptr)
{
  printf("From:   \n"); gets(ptr->from);
  printf("To:     \n"); gets(ptr->to);
  printf("Subject:\n"); gets(ptr->sub);
  printf("Message:\n"); gets(ptr->msg);


}

------------------------------

then I have the command "q" which when pressed has to keep all the written
emails in a mail.txt fuile..I made this:
--------------(comandoq.c)------------

#include <stdio.h>

FILE *fp;

fp = fopen("mail.txt","a");

fprintf(fp,"From:%s\n",from);
fprintf(fp,"To:%s\n",to);
fprintf(fp,"Subject:%s\n",sub);
fprintf(fp,"Message:%s\n",msg);
fprintf(fp,"\n");

fclose(fp);

}

----------------
it's not complete so I woudl like you to help me, please.
the output of the mail.txt file has to be something like this:

From: [email protected]
to: [email protected]
Date: ....
Subject: hfdhrt
Message: fdhdh

From: [email protected]
to: [email protected]
Date: ....
Subject: hfdhrt
Message: fdhdh

From: [email protected]
to: [email protected]
Date: ....
Subject: hfdhrt
Message: fdhdh

--------------

kan you help me please?
next I have to do a command that shows in the program the to,date and
subject of each message in "mail.txt" like this:

& h
N 1 <endereço da mensagem1> <data1> <titulo da mensagem1>
N 2 <endereço da mensagem2> <data2> <titulo da mensagem2>
N 3 <endereço da mensagem3> <data3> <titulo da mensagem3>

...
thanks a lot, help me please, it's a case of life or death because I have to deliver it the 2nd of january...


EDIT - the main problem it's the segmentation fault in the comandom.c , and I need some help in comandoq.c, which when called has to save all the written e-mails in "mail.txt"...
thanks.