ASCII Code confusion

[n2casey]

I m working on a project in C++. The prob I m facing is to distinguish between ASCII Codes, since some ASCII codes have two keys for them.


ASCII Code Key-1 Key-2

59 ; F1
60 < F2
. = .
. > .
. ? .
. @ .
. A .
. B .
. C .
68 D F10

71 Home G
82 Insert R
etc.


So how to a write program which scan any key but can distinguish between them.

[wizrulz]

REFER THIS..mi8 help u

http://www.ascii.cl/

[n2casey]

REFER THIS..mi8 help u

http://www.ascii.cl/

I already know about that link but don't get nething there.

[ahref]

For key-2, you have to press ctrl key means programatically you have to enable control key, which you can do by modifying memory address 0x417.

[n2casey]

For key-2, you have to press ctrl key means programatically you have to enable control key, which you can do by modifying memory address 0x417.

Plz tell more clearly.

[ahref]

check this program
void main()
{
char x,y,z;
clrscr();
printf("Press any key");
x=getch();

if(x==0)
{
y=getch();
printf("\nExtended Ascii code is %d",y);
}
else
{
printf("\nAscii Code is %d",x);
}
getch();
}

[n2casey]

Still facing the problem.

Look at this


void main()
{
...
char x;
x=getch();
if(x==59)
pf("x = %d",x);
else
pf("\a");
...
....
}


Since according to this table

ASCII Code Key-1 Key-2

59 ; F1
60 < F2
. = .
. > .
. ? .
. @ .
. A .
. B .
. C .
68 D F10

71 Home G
82 Insert R
etc.


both ; & F1 key has ASCII code 59 & according to my program I want that when I press F1, a beep sound must b there & x = 59 must not print on screen but when I press ; no beep must occur & x = 59 must print on screen.
That's why I asked to distinguish btwn keys.

[ahref]

void main()
{
char x,y,z;
clrscr();
printf("Press any key");
x=getch();

if(x==0)
{
y=getch();
printf("\a");
printf("\nExtended Ascii code is %d",y);
}
else
{
printf("\nAscii Code is %d",x);
}
getch();
}

[n2casey]

void main()
{
char x,y,z;
clrscr();
printf("Press any key");
x=getch();

if(x==0)
{
y=getch();
printf("\a");
printf("\nExtended Ascii code is %d",y);
}
else
{
printf("\nAscii Code is %d",x);
}
getch();
}

I have tried that but still problem not solved coz the statement

if(x==0)
{
y=getch();
printf("\a");
printf("\nExtended Ascii code is %d",y);
}
never gets executed. Every time I press F1, F2 etc. then first statement is executed & it prints Ascii Code is ...

[ahref]

That code should execute when you press F1,F2 key etc. It is working fine in my end. Probably you have to flush your keyboard buffer.

[n2casey]

OK ahref. Unfortunately your trick doesn't work on my system but I have solved my prob by modifying the program code.
Anyway, thx a lot for ur help. Ur trick added a new idea in my programming knowledge.

[n2casey]

Now a new prob. in another program.
Take a look at this prog.


#include<stdio.h>
#include<conio.h>
#include<dos.h>
void main()
{
int i=0;
char c='\0',s[50];
clrscr();
do
{
c=getch();
if(c>31 && c<127)
{
s[i]=c;
i++;
}
else if(c==13)
printf("%s",s);
else //or else if(c==0) both r ineffective
{
sound(400);
delay(50);
nosound();
}
}while(c!=13);
getch();
}

So for this prog, Keys F1 to F12, Home, End etc. must not b stored in string but they r stored in string.
I want that F1, F2.... etc. keys must not b stored in string. How can I do that?

[ahref]

I have done slight modifications. now it is not storing function keys check it

#include<stdio.h>
#include<conio.h>
#include<dos.h>
void main()
{
int i=0;
char c='\0',s[50],d;
clrscr();
do
{
c=getch();
if(c>31 && c<127)
{
s[i]=c;
i++;
}
else if(c==13)
{
s[i]='\0';
printf("%s",s);
}
else //or else if(c==0) both r ineffective
{
d=getch();
sound(400);
delay(50);
nosound();
}
}while(c!=13);
getch();
}

[n2casey]

OK ahref. Thx a lot for ur help.
Ur slight modification made a big difference. I don't know that why that idea doesn't came in my mind :(
Anyway, thx again & repu for u.

[Pathik]

offtopic: wich book to refer for c++... i ll start in a few days...

[n2casey]

offtopic: wich book to refer for c++... i ll start in a few days...
Book for C++ & OOP in C++, which I have -

THE WAITE GROUP'S
OBJECT ORIENTED PROGRAMMING IN
TURBO C++Writer - ROBERT LAFORE
Publishers - Galgotia Publicators Pvt. Ltd., 5, Ansari Road, Daryaganj, New Delhi

Price - 350 Rs.

[Pathik]

@n2casey r u into engg???? wich yr??? wich book is recommended by univ???
n thx for the name.. i ll try to get it...

[Ganeshkumar]

Any descent freee e boook???

[n2casey]

@n2casey r u into engg???? wich yr??? wich book is recommended by univ???
n thx for the name.. i ll try to get it...

I have completed my Engg. in June-06.
The book I have told U is recommended by Univ. for OOP in C++.
In First yr I read Let Us C or C++ by Yashwant Kanitker to learn C from beginning. In third yr I read the book

THE WAITE GROUP'S
OBJECT ORIENTED PROGRAMMING IN
TURBO C++
Writer - ROBERT LAFORE

& that time I come to know that it covers all topic in detail with very ease & lot of exapmles.
Let Us C/C++ both the books r good for beginners & easy too but will not cover all topics & so I told u to read OOP in Turbo C++ by Robert Lafore.

[Pathik]

@n2casey i saw the book OOPS in C++ by robert lafore...
but it was priced 540 rs... r u sure the price is 350 rs.

[n2casey]

@n2casey i saw the book OOPS in C++ by robert lafore...
but it was priced 540 rs... r u sure the price is 350 rs.

I have purchased it 2 months before in 350 Rs. from Delhi (not from publisher's shop). I will confirm its price & will tell u.

I was reading from my friend's book for last 2 yrs but now I have my own.
Well I suggest u to get one year old edition coz I don't found more changes in the book in last one year.

This link (http://www.amazon.com/Waite-Groups-Object-Oriented-Programming-Turbo/dp/1878739069/sr=1-6/qid=1166947895/ref=sr_1_6/105-0241724-7364465?ie=UTF8&s=books) might help u

[tuxfan]

I have a header file for all these key-codes. :) You have to just #include and start using it ;)

So insted of 0x1b you can use ESC for escape key.

Have a look at http://www.mailnspace.com/download/c.source/ :)

[n2casey]

@ tuxfan

Nice link friend. Repu for u.

[tuxfan]

@ tuxfan

Nice link friend. Repu for u.
Thanks :)

BTW, any more reps for writing that C code? Each line of code in the files offerred there is written by me! :)) Just pay little more attention to the functions lib and that sample calendar application where those functions are used. ;)

[Pathik]

@n2casey n others...
i saw the book oops in turbo c++ and also Oops in C++ by the same author- r lafore....... wich is better???
@ tuxfan can u also recommend some good book on c++ wich covers all the advanced topics....

[n2casey]

@n2casey n others...
i saw the book oops in turbo c++ and also Oops in C++ by the same author- r lafore....... wich is better???
@ tuxfan can u also recommend some good book on c++ wich covers all the advanced topics....

OOP in Turbo C++ is much better than OOP in C++.
Also it will cover many advanced topics. It's a good book for both beginners & advance programmers.

One suggestion for u, use the term OOP (Object Oriented Programming) instead of OOPs.

[tuxfan]

I really have no idea on books on C++. But I have read Yashwant Kanetkar's Let Us C, Pointers in C, etc. and they were good. There is also a book called Let Us C++ by the same author.

I have also read his columns in newspapers, magazines, etc. and know that he is a knowledgeable person who writes well. Try his book.