[9fans] compiling error

[9fans] compiling error

[Gabriel Díaz]

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

Re: [9fans] compiling error

[Skip Tavakkolian]

> 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.

RE: [9fans] compiling error

[Gabriel Díaz]

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.

RE: [9fans] compiling error

[Skip Tavakkolian]

> The code compiles unless you uncomment the // print("%f",
> fabs(a)*FMAX(b,1.0)/c);

it's still because of the macro: the ';' at the end

RE: [9fans] compiling error

[Gabriel Díaz]

Oh!!!!

Thank you very much, i'm off to buy a new glasses :)

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 9:20
Para: 9fans@cse.psu.edu
Asunto: RE: [9fans] compiling error

> The code compiles unless you uncomment the // print("%f",
> fabs(a)*FMAX(b,1.0)/c);

it's still because of the macro: the ';' at the end

Re: [9fans] compiling error

[matt]

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);
}