* [9fans] compiling error
@ 2007-03-14 6:38 Gabriel Díaz
2007-03-14 7:21 ` Skip Tavakkolian
2007-03-14 9:44 ` matt
0 siblings, 2 replies; 6+ messages in thread
From: Gabriel Díaz @ 2007-03-14 6:38 UTC (permalink / raw)
To: 'Fans of the OS Plan 9 from Bell Labs'
Hello
In the following sample, why the commented print gives a syntax error?
cpu% 8c -FVw t.c
t.c:12 syntax error, last name: maxarg2
#include <u.h>
#include <libc.h>
static double maxarg1,maxarg2;
#define FMAX(a,b)
(maxarg1=(a),maxarg2=(b),(maxarg1)>(maxarg2)?(maxarg1):(maxarg2));
void main(void){
float a,b,c,d;
a=1.0; b=2.0; c=3.0;
d=FMAX(b,1.0);
// print("%f", fabs(a)*FMAX(b,1.0)/c);
print("%f", fabs(a)*d/c);
}
Thanks
Gabi
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [9fans] compiling error
2007-03-14 6:38 [9fans] compiling error Gabriel Díaz
@ 2007-03-14 7:21 ` Skip Tavakkolian
2007-03-14 7:47 ` Gabriel Díaz
2007-03-14 9:44 ` matt
1 sibling, 1 reply; 6+ messages in thread
From: Skip Tavakkolian @ 2007-03-14 7:21 UTC (permalink / raw)
To: 9fans
> cpu% 8c -FVw t.c
> t.c:12 syntax error, last name: maxarg2
i get the error in a different place.
% 8c -FVw t.c
t.c:7 syntax error, last name: maxarg1
> #define FMAX(a,b)
> (maxarg1=(a),maxarg2=(b),(maxarg1)>(maxarg2)?(maxarg1):(maxarg2));
the problem is the macro. adding a \ to escape \n or putting
the macro def on the same line fixes it.
^ permalink raw reply [flat|nested] 6+ messages in thread
* RE: [9fans] compiling error
2007-03-14 7:21 ` Skip Tavakkolian
@ 2007-03-14 7:47 ` Gabriel Díaz
2007-03-14 8:20 ` Skip Tavakkolian
0 siblings, 1 reply; 6+ messages in thread
From: Gabriel Díaz @ 2007-03-14 7:47 UTC (permalink / raw)
To: 'Fans of the OS Plan 9 from Bell Labs'
Hello
That \n was inserted by this "intelligent" email client sorry.
The code compiles unless you uncomment the // print("%f",
fabs(a)*FMAX(b,1.0)/c);
Thanks
Gabi
-----Mensaje original-----
De: 9fans-bounces+gabidiaz=gmail.com@cse.psu.edu
[mailto:9fans-bounces+gabidiaz=gmail.com@cse.psu.edu] En nombre de Skip
Tavakkolian
Enviado el: miércoles, 14 de marzo de 2007 8:22
Para: 9fans@cse.psu.edu
Asunto: Re: [9fans] compiling error
> cpu% 8c -FVw t.c
> t.c:12 syntax error, last name: maxarg2
i get the error in a different place.
% 8c -FVw t.c
t.c:7 syntax error, last name: maxarg1
> #define FMAX(a,b)
> (maxarg1=(a),maxarg2=(b),(maxarg1)>(maxarg2)?(maxarg1):(maxarg2));
the problem is the macro. adding a \ to escape \n or putting
the macro def on the same line fixes it.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [9fans] compiling error
2007-03-14 6:38 [9fans] compiling error Gabriel Díaz
2007-03-14 7:21 ` Skip Tavakkolian
@ 2007-03-14 9:44 ` matt
1 sibling, 0 replies; 6+ messages in thread
From: matt @ 2007-03-14 9:44 UTC (permalink / raw)
To: Fans of the OS Plan 9 from Bell Labs
cpp is your friend
cat | cpp -P << EOF
static double maxarg1,maxarg2;
#define FMAX(a,b)
(maxarg1=(a),maxarg2=(b),(maxarg1)>(maxarg2)?(maxarg1):(maxarg
2));
void main(void){
float a,b,c,d;
a=1.0; b=2.0; c=3.0;
d=FMAX(b,1.0);
print("%f", fabs(a)*FMAX(b,1.0)/c);
}
EOF
static double maxarg1,maxarg2;
void main(void){
float a,b,c,d;
a=1.0; b=2.0; c=3.0;
d=(maxarg1=(b),maxarg2=(1.0),(maxarg1)>(maxarg2)?(maxarg1):(maxarg2));;
print("%f",
fabs(a)*(maxarg1=(b),maxarg2=(1.0),(maxarg1)>(maxarg2)?(maxarg1):(maxarg2));/c);
}
^ permalink raw reply [flat|nested] 6+ messages in thread
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2007-03-14 6:38 [9fans] compiling error Gabriel Díaz
2007-03-14 7:21 ` Skip Tavakkolian
2007-03-14 7:47 ` Gabriel Díaz
2007-03-14 8:20 ` Skip Tavakkolian
2007-03-14 8:32 ` Gabriel Díaz
2007-03-14 9:44 ` matt
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