• Andrew Edwards <remove_ridimz remove_yahoo.com> Feb 15 2004
• "Ben Hinkle" <bhinkle4 juno.com> Feb 15 2004
• Andrew Edwards <remove_ridimz remove_yahoo.com> Feb 15 2004
• Sam McCall <tunah.d tunah.net> Feb 16 2004
• Andrew Edwards <remove_ridimz remove_yahoo.com> Feb 16 2004
• "Ben Hinkle" <bhinkle4 juno.com> Feb 16 2004
• Vathix <vathix dprogramming.com> Feb 15 2004

Andrew Edwards <remove_ridimz remove_yahoo.com> writes:

Every now and then this topic rears it's ugly head but there seem to be 
no real solution for to the problem. I'm trying to scan a string 
(char[]) from a text document or from stdin. What is the correct way to 
do this? I am aware of the readLine and readString functions available 
in stream.d but this is not exactly what I'm looking for. Additionally I 
  could:

char[] str;
char[80] s;
scanf("%s",cast(char*)s);

str = toStringz(s);

but this does not alleviate the problem. Since dynamic string (char[]) 
guards against array overrunning, it is my first choice when considering 
string input. I think this is a problem that needs to be remedied, 
especially for novice programmers (not to say that we are the only ones 
that use such features), prior to v1.0?

"Ben Hinkle" <bhinkle4 juno.com> writes:

"Andrew Edwards" <remove_ridimz remove_yahoo.com> wrote in message
news:c0ol66$28jl$1 digitaldaemon.com...
| Every now and then this topic rears it's ugly head but there seem to be
| no real solution for to the problem. I'm trying to scan a string
| (char[]) from a text document or from stdin. What is the correct way to
| do this? I am aware of the readLine and readString functions available
| in stream.d but this is not exactly what I'm looking for. Additionally I
|   could:
|
| char[] str;
| char[80] s;
| scanf("%s",cast(char*)s);
|
| str = toStringz(s);
|
| but this does not alleviate the problem. Since dynamic string (char[])
| guards against array overrunning, it is my first choice when considering
| string input. I think this is a problem that needs to be remedied,
| especially for novice programmers (not to say that we are the only ones
| that use such features), prior to v1.0?

Did you try the scanf method in std.stream instead of the std.c.scanf?
 stdin.scanf("%.s",&str);

Andrew Edwards <remove_ridimz remove_yahoo.com> writes:

Ben Hinkle wrote:
 "Andrew Edwards" <remove_ridimz remove_yahoo.com> wrote in message
 news:c0ol66$28jl$1 digitaldaemon.com...
 | Every now and then this topic rears it's ugly head but there seem to be
 | no real solution for to the problem. I'm trying to scan a string
 | (char[]) from a text document or from stdin. What is the correct way to
 | do this? I am aware of the readLine and readString functions available
 | in stream.d but this is not exactly what I'm looking for. Additionally I
 |   could:
 |
 | char[] str;
 | char[80] s;
 | scanf("%s",cast(char*)s);
 |
 | str = toStringz(s);
 |
 | but this does not alleviate the problem. Since dynamic string (char[])
 | guards against array overrunning, it is my first choice when considering
 | string input. I think this is a problem that needs to be remedied,
 | especially for novice programmers (not to say that we are the only ones
 | that use such features), prior to v1.0?
 
 Did you try the scanf method in std.stream instead of the std.c.scanf?
  stdin.scanf("%.s",&str);
 
 



char[] str;
stdin.scanf("%.s",&str);
printf(str);

results in:

C:\>test
Error: Access Violation

Sam McCall <tunah.d tunah.net> writes:

 char[] str;
 stdin.scanf("%.s",&str);
 printf(str);
 
 results in:
 
 C:\>test
 Error: Access Violation


I don't know, just wondering...
Sam

Andrew Edwards <remove_ridimz remove_yahoo.com> writes:

Sam McCall wrote:
 char[] str;
 stdin.scanf("%.s",&str);
 printf(str);

 results in:

 C:\>test
 Error: Access Violation


 Should that be %.*s or %s?
 I don't know, just wondering...
 Sam


I'll give any suggestion a try, maybe he stumbled onto something I 
overlooked. As it were, that wasn't the case. The std.c.scanf() never 
has never worked, and it seems that steam.scanf() broke along the way.

Andrew

"Ben Hinkle" <bhinkle4 juno.com> writes:

"Sam McCall" <tunah.d tunah.net> wrote in message
news:c0q2mq$1g60$1 digitaldaemon.com...
| > char[] str;
| > stdin.scanf("%.s",&str);
| > printf(str);
| >
| > results in:
| >
| > C:\>test
| > Error: Access Violation
| Should that be %.*s or %s?

oops. that should be %.*s


| I don't know, just wondering...
| Sam

Vathix <vathix dprogramming.com> writes:

Ben Hinkle wrote:

 "Andrew Edwards" <remove_ridimz remove_yahoo.com> wrote in message
 news:c0ol66$28jl$1 digitaldaemon.com...
 | Every now and then this topic rears it's ugly head but there seem to be
 | no real solution for to the problem. I'm trying to scan a string
 | (char[]) from a text document or from stdin. What is the correct way to
 | do this? I am aware of the readLine and readString functions available
 | in stream.d but this is not exactly what I'm looking for. Additionally I
 |   could:
 |
 | char[] str;
 | char[80] s;
 | scanf("%s",cast(char*)s);
 |
 | str = toStringz(s);
 |
 | but this does not alleviate the problem. Since dynamic string (char[])
 | guards against array overrunning, it is my first choice when considering
 | string input. I think this is a problem that needs to be remedied,
 | especially for novice programmers (not to say that we are the only ones
 | that use such features), prior to v1.0?
 
 Did you try the scanf method in std.stream instead of the std.c.scanf?
  stdin.scanf("%.s",&str);
 



&str is very different from cast(char*)str, and cast(char*)str is also 
very different from str.

Stream's scanf seems to be broken. When I do this:
stdin.scanf("%3s", cast(char*)s);
it will keep on writing past 3 characters. The C scanf from std.c.stdio 
handles it correctly, but I can't get it to read the string length from 
the stack like we do with printf.


-- 
Christopher E. Miller
www.dprogramming.com
irc.dprogramming.com #D