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D - newbees printf

reply "Florian Lavrard" <flavrard free.fr.nospam.> writes:
i've a little problem with printf()
 printf("%d",var);
- var could be an int or a char (or other)
 It don't word gook with char if i use "%d", or don't work good with int if
i use "%c"...


Have you got some tips please ?

thanks

Florian
May 10 2003
parent reply Helmut Leitner <leitner hls.via.at> writes:
Florian Lavrard wrote:
 
 i've a little problem with printf()
  printf("%d",var);
 - var could be an int or a char (or other)
  It don't word gook with char if i use "%d", or don't work good with int if
 i use "%c"...
 
 Have you got some tips please ?

You are not quite clear about your problems. If you have int i=66; char c='A'; you would typically use printf("%d",i); printf("%c",c); for printing. If you want to print the numerical value of the character, you might use printf("%d",(int)c); or even just printf("%d",c); If you want to print the int as character (66=B) you could do it this way printf("%c",i); But maybe I don't understand your problem. Please describe it. -- Helmut Leitner leitner hls.via.at Graz, Austria www.hls-software.com
May 10 2003
parent reply "Florian Lavrard" <flavrard free.fr.nospam.> writes:
Right,  you have not understand, ;-)
( but i'm not sure to use the best english, i'm french)

So let's try again with an exemple :

error is explained just after source code :

template Gcouple(T){
     public class couple{
     private :
          private T fst;

     public :
          this (T passfst){ this.fst = passfst;}
          T getFst() {return fst;}
          void show(){printf("%c",getFst());}
      }
}

void main(){


instance Gcouple(int) intcouple;
intcouple.couple couple1= new intcouple.couple(1);
couple1.show();

printf("\n test COUPLE char \n");
instance Gcouple(char) charcouple;
charcouple.couple couplea= new charcouple.couple('a');
couplea.show();
}


couplea.show() use printf("%c",...); to print a char >>> .It's right
couple1.show() use printf("%c",...); to print a int >>>it's not right

Do you understand my problem well ? I hope.

( because this is just an exemple not the the true need i don't want to cast
int in char ...)




Florian

"Helmut Leitner" <leitner hls.via.at> a ιcrit dans le message news:
3EBD1CE8.9A47632 hls.via.at...
 Florian Lavrard wrote:
 i've a little problem with printf()
  printf("%d",var);
 - var could be an int or a char (or other)
  It don't word gook with char if i use "%d", or don't work good with int


 i use "%c"...

 Have you got some tips please ?

You are not quite clear about your problems. If you have int i=66; char c='A'; you would typically use printf("%d",i); printf("%c",c); for printing. If you want to print the numerical value of the character, you might use printf("%d",(int)c); or even just printf("%d",c); If you want to print the int as character (66=B) you could do it this way printf("%c",i); But maybe I don't understand your problem. Please describe it. -- Helmut Leitner leitner hls.via.at Graz, Austria www.hls-software.com

May 10 2003
next sibling parent "Carlos Santander B." <carlos8294 msn.com> writes:
"Florian Lavrard" <flavrard free.fr.nospam.> escribiσ en el mensaje
news:b9ljqq$26qc$1 digitaldaemon.com...
| Right,  you have not understand, ;-)
| ( but i'm not sure to use the best english, i'm french)
|
| So let's try again with an exemple :
|
| error is explained just after source code :
|
| template Gcouple(T){
|      public class couple{
|      private :
|           private T fst;
|
|      public :
|           this (T passfst){ this.fst = passfst;}
|           T getFst() {return fst;}
|           void show(){printf("%c",getFst());}
|       }
| }
|
| void main(){
|
|
| instance Gcouple(int) intcouple;
| intcouple.couple couple1= new intcouple.couple(1);
| couple1.show();
|
| printf("\n test COUPLE char \n");
| instance Gcouple(char) charcouple;
| charcouple.couple couplea= new charcouple.couple('a');
| couplea.show();
| }
|
|
| couplea.show() use printf("%c",...); to print a char >>> .It's right
| couple1.show() use printf("%c",...); to print a int >>>it's not right
|
| Do you understand my problem well ? I hope.
|
| ( because this is just an exemple not the the true need i don't want to
cast
| int in char ...)
|
|
|
|
| Florian
|

I don't know what the problem is. I compiled and ran it and I got a smiling
face and an 'a', and that's what should be since ascii 1 is a smiling face.
Now, if you want to print 1, then you should put %d instead of %c.

—————————————————————————
Carlos Santander


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May 11 2003
prev sibling parent reply "Carlos Santander B." <carlos8294 msn.com> writes:
"Florian Lavrard" <flavrard free.fr.nospam.> escribiσ en el mensaje
news:b9ljqq$26qc$1 digitaldaemon.com...
|
| couplea.show() use printf("%c",...); to print a char >>> .It's right
| couple1.show() use printf("%c",...); to print a int >>>it's not right
|

If you want to print 1 and 'a', try this:

void show(){printf("%.*s",toStr(getFst()));}  //1
...
//outside template
import string;

char[] toStr(int i) { return string.toString(i); }  //2
char[] toStr(char c) { //3
 char [] res;
 res ~= c;
 return res;
}

This leads to a bug. I couldn't use toString instead of toStr in //2 and //3
because dmd complained in //1 that toString() doesn't match (int). I know
why's that: because dmd looks for toString inside the class. But wouldn't it
be desirable if dmd could look outside the class too? I mean, if it doesn't
find a function inside the class, then try inside the module, then inside
the imports, etc. Could it be possible?

—————————————————————————
Carlos Santander


---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.478 / Virus Database: 275 - Release Date: 2003-05-06
May 11 2003
next sibling parent "Carlos Santander B." <carlos8294 msn.com> writes:
"Carlos Santander B." <carlos8294 msn.com> escribiσ en el mensaje
news:b9lpra$2chc$1 digitaldaemon.com...
| ...
| This leads to a bug. I couldn't use toString instead of toStr in //2 and
//3
| ...

My mistake: there's no bug in the code I posted. Getting there led me to
that bug.

—————————————————————————
Carlos Santander


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Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
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May 11 2003
prev sibling parent reply "Florian Lavrard" <flavrard free.fr.nospam.> writes:
thanks but i don't want to import string,
something else ?

Can't  i overload printf ? how ?

florian

"Carlos Santander B." <carlos8294 msn.com> a ιcrit dans le message news:
b9lpra$2chc$1 digitaldaemon.com...
 "Florian Lavrard" <flavrard free.fr.nospam.> escribiσ en el mensaje
 news:b9ljqq$26qc$1 digitaldaemon.com...
 |
 | couplea.show() use printf("%c",...); to print a char >>> .It's right
 | couple1.show() use printf("%c",...); to print a int >>>it's not right
 |

 If you want to print 1 and 'a', try this:

 void show(){printf("%.*s",toStr(getFst()));}  //1
 ...
 //outside template
 import string;

 char[] toStr(int i) { return string.toString(i); }  //2
 char[] toStr(char c) { //3
  char [] res;
  res ~= c;
  return res;
 }

 This leads to a bug. I couldn't use toString instead of toStr in //2 and

 because dmd complained in //1 that toString() doesn't match (int). I know
 why's that: because dmd looks for toString inside the class. But wouldn't

 be desirable if dmd could look outside the class too? I mean, if it

 find a function inside the class, then try inside the module, then inside
 the imports, etc. Could it be possible?

 -------------------------
 Carlos Santander


 ---
 Outgoing mail is certified Virus Free.
 Checked by AVG anti-virus system (http://www.grisoft.com).
 Version: 6.0.478 / Virus Database: 275 - Release Date: 2003-05-06

May 12 2003
parent "Carlos Santander B." <carlos8294 msn.com> writes:
"Florian Lavrard" <flavrard free.fr.nospam.> escribiσ en el mensaje
news:b9q59r$p7o$1 digitaldaemon.com...
| thanks but i don't want to import string,
| something else ?
|
| Can't  i overload printf ? how ?
|
| florian
|

Sure, write your own :D

—————————————————————————
Carlos Santander


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May 13 2003