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.

[b]ASCII Code[/b]     [b]Key-1[/b]     [b]Key-2[/b]

  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

*www.ascii.cl/

 

[n2casey]

REFER THIS..mi8 help u

*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

[b]ASCII Code[/b]     [b]Key-1[/b]     [b]Key-2[/b]

  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.