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Quote:
My print func() in my program isn't working properly. It asks for user input and then searches the file. When found, a function is called to set up the print format, then returns the format to print on printer. I tried using a separate function which is at the moment commented out. The func() seems to run all the way through because i get to key_wait, but nothing gets printed. Anybody have any ideas? The code is attached.
have you tried just printing to a text file to make sure your prog is working ok ?? if so try stdprn ??
see please help me thread for all i know about printing to printer(which isn't much)
> FILE *printer = fopen("LPT1","w");
You dont check to see if this is NULL
And typically, to see anything printed, you have to finish off by sending a form feed
fprintf( printer, "\f" );
to flush the printer buffer onto the page.
Quote:
Originally posted by Salem
> FILE *printer = fopen("LPT1","w");
You dont check to see if this is NULL
And typically, to see anything printed, you have to finish off by sending a form feed
fprintf( printer, "\f" );
to flush the printer buffer onto the page.
Quote:
I tried making the changes you specified but now I'm recieving 7 errors. I don't think I have implemented these changes in the proper locations. I have tried several scenarios but still no luck. Could you take a look at the updated function and see if you know where I'm going wrong?
Thx in advance. Peace.
The start of print_label
Code://!! FILE *printer = fopen("LPT1","w");
FILE *printer;
FILE *dta_file;
char buf[BUFSIZ];
int user_inputted_client_code;
clrscr();
printf("\t\t\tClient Inventory Management \n\n\n");
printf("\tPrint Client Label \n\n");
printf("Client Code: ");
scanf("%d",&user_inputted_client_code);
if((dta_file=fopen(FILENAME,"rb")) == NULL)
{
perror(FILENAME);
return(1);
}
//!! if((FILE *printer = fopen("LPT1","w")) == NULL)
if((printer = fopen("LPT1","w")) == NULL)
{
//!! perror(LPT1);
perror("LPT1");
return (1);
}
Quote:
Thx, stupid mistakes, but mistakes none the less!
The func() still won't print but I'm sure you already know that. My next question would be: in my while loop->
The first method I tried is now commented out for the time being: am I able to call the 'printclient2' func()/ do I need to? Should the other two commented(out) lines be inside the 'while' or outside?Code:while( fgets(buf,BUFSIZ,dta_file) != NULL )
{
// fprintf(printer,"printclient2(&another_client)",buf);
fprintf(printer,"buf");
fprintf(printer,"\f");
}
//fprintf(printer,"buf");
//fprintf(printer,"\f");
}
Secondly I thought maybe since the structure should be found at this point, I should just use the 'fprintf' commands inside the 'while'?
Tried both and obviously I must be missing something or my code is in the wrong places. Any more suggestions?
The finished results I am trying to achieve, should look exactly like the screen print of the 'printclient2' func() except on paper.
Does it actually print anything at all?
Also try
int n = fprintf( printer, "buf" );
if ( n != 3 ) {
perror( "no dice" );
}
Quote:
Originally posted by Salem
Does it actually print anything at all?
Also try
int n = fprintf( printer, "buf" );
if ( n != 3 ) {
perror( "no dice" );
}
Quote:
No, it doesn't print anything. The print controls don't show up or anything.
Where would I put the suggested 'if' statement?
Spentdome, OT question:
Out of curiousity, why do you suddenly put everything you say in quote tags?
Is your printer connected to the parallel, serial or USB port?
Quote:
Originally posted by Shadow
Spentdome, OT question:
Out of curiousity, why do you suddenly put everything you say in quote tags?
Quote:
Because out of the questions I've previously asked, people kept *****'in about me not using quote or code tags. Is it a problem?
Quote:
Originally posted by Hammer
Is your printer connected to the parallel, serial or USB port?
No, I double checked that cause I thought the same thing, but it is 'LPT1".
I can't figure out why it won't work? Do you see anything wrong with what I have? Am I missing something obvious?
No quote tags 'Shadow', now you can relax.
You could try approaching the problem from a different angle
Now the print command can be used to print a text file. Rather than changing your program, I would suggest some experiments with the print command to see if you can actually print anything.Code:D:\code>print /?
Prints a text file.
PRINT [/D:device] [[drive:][path]filename[...]]
/D:device Specifies a print device.
Something else to look at
> if((printer = fopen("LPT1","w")) == NULL)
Do you have a file called "LPT1" in your directory?
No, not really.Quote:
people kept *****'in about me not using quote or code tags. Is it a problem?
Code tags are for code.
Quote tags are for quoting somebody.
Bold is for stern emphasis.
Italic is for casual emphasis.
Caps lock is for loud emphasis.
I don't have a problem with it, I was just curious. :confused:
Good luck with your problem..
....if any of that helps.Code:/*
Program:
Printer.c
Purpose:
Demonstrates how to use the printer
in your programs.
*/
#include <stdio.h>
#include <stdlib.h>
int main(void)
{
FILE *printer = fopen("LPT1","w");
FILE *fp;
char str[256];
char buf[BUFSIZ];
printf("File name?\n ");
scanf("%s",str);
fp = fopen(str,"r");
if(!fp)
{
printf("File does not exist\n");
return -1;
}
while( fgets(buf,sizeof buf,fp) != NULL )
{
printf("\nPrinting..\n");
fprintf(printer,"%s",buf);
}
fprintf(printer,"\f");
return 0;
}
To answer the reply prior to this one, what do you mean by "do I have a file in my directory called 'LPT1'? Do you mean a file in my program or on my computer? My printer file on my computer is Lexmark....but it is conected via 'LPT1' port. Do I need to create a file in my program called 'LPT1'? If so what is the purpose?Quote:
Originally posted by Shadow
....if any of that helps.Code:/*
Program:
Printer.c
Purpose:
Demonstrates how to use the printer
in your programs.
*/
#include <stdio.h>
#include <stdlib.h>
int main(void)
{
FILE *printer = fopen("LPT1","w");
FILE *fp;
char str[256];
char buf[BUFSIZ];
printf("File name?\n ");
scanf("%s",str);
fp = fopen(str,"r");
if(!fp)
{
printf("File does not exist\n");
return -1;
}
while( fgets(buf,sizeof buf,fp) != NULL )
{
printf("\nPrinting..\n");
fprintf(printer,"%s",buf);
}
fprintf(printer,"\f");
return 0;
}
The sample code you just sent me is the same sample I started with. The problem with this is that what I'm trying to do is search my 'client.dat' file which holds strutures containing 'client code'. When it finds the client code, I want to print that structure out on paper. Hers is how I've modified it so far:
Some things are commented out for now because I was trying different options. Also, I didn't think I had any use for 'char str[256]' where as I'm searching for an 'int client_code'. I'm totally stumped.Code:/************************************************************/
char print_label (void)
/*
Task: Prints shipping information
*/
/************************************************************/
{
FILE *printer;
FILE *dta_file;
char buf[BUFSIZ];
int user_inputted_client_code;
clrscr();
printf("\t\t\tClient Inventory Management \n\n\n");
printf("\tPrint Client Label \n\n");
printf("Client Code: ");
scanf("%d",&user_inputted_client_code);
if((dta_file=fopen(FILENAME,"rb")) == NULL)
{
perror(FILENAME);
return(1);
}
if((printer = fopen("LPT1","w")) == NULL)
{
perror("LPT1");
return (1);
}
while((fread(&another_client,sizeof(struct fclient),1,dta_file)) == 1)
{
if(user_inputted_client_code == another_client.client_code)
{
fgets(buf,sizeof buf,dta_file);
while( fgets(buf,BUFSIZ,dta_file) != NULL )
{
// fprintf(printer,"printclient2(&another_client)",buf);
fprintf(printer,"buf");
fprintf(printer,"\f");
}
//fprintf(printer,"buf");
//fprintf(printer,"\f");
}
}
if(!dta_file)
{
printf("File does not exist\n");
return -1;
}
fclose(dta_file);
key_wait();
return 0;
}
/*HERE IS THE INTERNAL FUNCTION BEING CALLED*/
/************************************************************/
int printclient2 (struct fclient *client)
/************************************************************/
{
printf ("Client Code: %d\n\n", client->client_code);
printf ("Client Name: %s\n", client->clientname);
printf ("Street Address: %s\n", client->street_address);
printf ("City: %s\n", client->city);
printf ("Province or State: %s\n", client->pros);
printf ("Country: %s\n", client->country);
printf ("Postal or Zip Code: %s\n\n\n", client->postalorzip_code);
return(1);
}
All suggestions welcome, but I would prefer keeping the program the same without having to make drastic changes. I need to have this working by tommorrow night at the latest or it's my ass!
Thx.
> what do you mean by "do I have a file in my directory called 'LPT1'?
I mean
If you have a file called LPT1, then you just created a file, you didn't send anything to the printer, and it wouldn't complain when you tried to write to itCode:D:\code\test>dir
Volume in drive D is Apps
Volume Serial Number is 0429-F1A4
Directory of D:\code\test
27/05/2002 19:35 <DIR> .
27/05/2002 19:35 <DIR> ..
0 File(s) 0 bytes
2 Dir(s) 1,974,091,776 bytes free
Other things to try
DOS used to use a trailing : to signify a device and not a file, so perhaps one of these
printer = fopen("LPT1","w")
printer = fopen("LPT1:","w")
printer = fopen("PRN","w")
printer = fopen("PRN:","w")
Thx I'll try those and maybe I'll have some luck. Still wondering about my 2nd 'while'. Which way would you assume is correct: the commented out parts or what is showing now?Quote:
Originally posted by Salem
> what do you mean by "do I have a file in my directory called 'LPT1'?
I mean
If you have a file called LPT1, then you just created a file, you didn't send anything to the printer, and it wouldn't complain when you tried to write to itCode:D:\code\test>dir
Volume in drive D is Apps
Volume Serial Number is 0429-F1A4
Directory of D:\code\test
27/05/2002 19:35 <DIR> .
27/05/2002 19:35 <DIR> ..
0 File(s) 0 bytes
2 Dir(s) 1,974,091,776 bytes free
Other things to try
DOS used to use a trailing : to signify a device and not a file, so perhaps one of these
printer = fopen("LPT1","w")
printer = fopen("LPT1:","w")
printer = fopen("PRN","w")
printer = fopen("PRN:","w")
Actually, until your printer is working, I haven't been looking too closely at the finer detail of your code.
It's not far off, so once it prints, getting it to work shouldn't be a problem
Until my printer's working? My printer works fine. My code won't open the path to the printer. I tried all the different DOS commands and I think it should probably be 'LPT1:'. In properties of my printer, it's set to "LPT1: (printer port)". Should I include "(printer port)" or would that make any difference? I'm thinking not. Your thoughts?Quote:
Originally posted by Salem
Actually, until your printer is working, I haven't been looking too closely at the finer detail of your code.
It's not far off, so once it prints, getting it to work shouldn't be a problem
Also,Quote:
Originally posted by spentdome
Until my printer's working? My printer works fine. My code won't open the path to the printer. I tried all the different DOS commands and I think it should probably be 'LPT1:'. In properties of my printer, it's set to "LPT1: (printer port)". Should I include "(printer port)" or would that make any difference? I'm thinking not. Your thoughts?
Should this at least open the printer path and should the printer at least suck paper through even if nothing is printed?Code:while( fgets(buf,BUFSIZ,dta_file) != NULL )
{
fprintf(printer,"printclient2(&another_client)",buf);
fprintf(printer,"\f");
}
Test the program I submitted.
Compile it and run it.
Simply enter the full path to a file, with your printer on, and it should print in default mode ( not even, plain text actually ) as if you printed from notepad.
If this doesn't work, something hasn't been covered.
Spentdome, do me a favour, try this before any more coding:
Turn your printer on, make sure it's plugged in. Go to a DOS prompt, change directory to where your source file is, and type the following:
Now, does this print anything? On my PC, my printer isn't connected via LPT1, so I get the following message:Code:type code3.c >LPT1
We need to do this to proove that you can get to your printer via DOS. It's no good in printing something through Windows (say notepad or Word etc), because they use a completely different method of communication.Code:C:\>type junk1.c >lpt1
Write fault error writing device LPT1
Abort, Retry, Ignore, Fail?
You may have already done this, but from your posts, it's not clear what stage we're at. :)
> type code3.c >LPT1
I tried that, and it doesn't work.
Although, I don't have type.
The only dos editor I have is EDIT ( Micro$oft ).
It apparently doesn't have redirection.
OK, try Salem's Print (see earlier post). It should do the same thing.Quote:
Originally posted by Shadow
> type code3.c >LPT1
I tried that, and it doesn't work.
Although, I don't have type.
Out of interest, what OS you have Shadow?
Quote:
Originally posted by Hammer
OK, try Salem's Print (see earlier post). It should do the same thing.
Out of interest, what OS you have Shadow?
Do you meen this?
What's this?Code:D:\code\test>dir
Volume in drive D is Apps
Volume Serial Number is 0429-F1A4
Directory of D:\code\test
27/05/2002 19:35 <DIR> .
27/05/2002 19:35 <DIR> ..
0 File(s) 0 bytes
2 Dir(s) 1,974,091,776 bytes free
this:
I don't have the Print command, but you might.Code:D:\code>print /?
Prints a text file.
PRINT [/D:device] [[drive:][path]filename[...]]
/D:device Specifies a print device.
Quote:
Originally posted by Hammer
this:
I don't have the Print command, but you might.Code:D:\code>print /?
Prints a text file.
PRINT [/D:device] [[drive:][path]filename[...]]
/D:device Specifies a print device.
I don't understand you want me to do with this code?
> Out of interest, what OS you have Shadow?
Win98SE.
Oh, and I don't really need Salem's example.
The program I posted works perfectly fine for me. :)
No, it's a DOS command. Print and Type are DOS commands. See if you have either, and see if you can get either of them to print anything. We're just trying to ensure DOS can talk directly to your printer, before you waste any more time doing coding.
> I don't understand you want me to do with this code?
I don't think it's code really.
Perhaps it's a command line program possibliy packaged with an OS?
> I don't understand you want me to do with this code?
Pesonally, I think you should all just give up. This person has no grasp of how to use a DOS (console) session or any familiarity what so ever with DOS commands. This is a lost cause.
Quzah.
You took the words out of my mouth. :)Quote:
Pesonally, I think you should all just give up. This person has no grasp of how to use a DOS (console) session or any familiarity what so ever with DOS commands. This is a lost cause.
Quote:
Originally posted by Shadow
You took the words out of my mouth. :)
Easy people, I'll be the first one to admit I don't know enough to be trying to do what I am, but I just started school 6 months ago with no background. We've covered COBOL, 3 days of DOS so far and I've been learning 'data structures' and 'C' for 3 months. What do you expect?
Have you managed to print anything from DOS yet?
No I'm considering givin up. I'm not sure if I have the basic skills needed to complete this func().Quote:
Originally posted by Hammer
Have you managed to print anything from DOS yet?
> No I'm considering givin up.Quote:
Easy people, I'll be the first one to admit I don't know enough to be trying to do what I am, but I just started school 6 months ago with no background. We've covered COBOL, 3 days of DOS so far and I've been learning 'data structures' and 'C' for 3 months. What do you expect?
Check your private messages.
If you don't have them enabled, enable them.
Clearly, groups are not good for you.
If you have a problem with e-mailing or instant messengers, then sorry, but your on your own.
I'll offer what I can, but keep in mind, this is all volunteer.