gcc error ?

[Derfinak Jan]

On Thu, 30 Oct 1997, mao wrote:

> chci se zeptat jestli by nekdo nevysvetlil tohle:
> 
> #include <stdio.h>
> #include <stdarg.h>
> #include <math.h>
> 
> 
> void foo( char *fmt, ... )
> {
> 	va_list ap;
> 	float f;
> 
> 	va_start( ap, fmt );
> 	f = va_arg( ap, float );

	f = va_arg( ap, double);

info libc:
Furthermore, this argument's type must be "self-promoting": that is,
the default promotions must not change its type.  This rules out array
and function types, as well as `float', `char' (whether signed or not)
and `short int' (whether signed or not).  This is actually an ANSI C
requirement.

> 	printf(" predany float je: %f\n", f );
> 	va_end( ap ); 
> }
> 
> void main()
> {
> 	float f;
> 
> 	f=3.14;
> 	if ( f!=3.14 )

	if (f! = (float)3.14 )
Toto je jasne.

> 		printf(" Error 3.14!=%f\n", f ); /*to je jedna vec*/
> 	
> 	foo( "Test Floatu", f );
> }
> 
> me to udelalo:
> 	3.14!=3.140000
> 	predany float je: 834722443.2432524

Teraz je vysledok:
 predany float je: 3.140000


					jano

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