Periergh (?) symperifora toy gcc

[Giorgos Keramidas]

On Mon, Jun 26, 2000 at 01:56:52AM +0300, Anthony Petropoulos wrote:
> 
> Estw elaxisto programmataki:
> 
> #include <stdio.h>
> main() {
> 	float a;
> 	a=atof("123.45");
> 	printf("%f\n", a);
> }
> 
> To parapanw 6-liner kanei kanonika compile alla bgazei garbage ws
> apotelesma. To problhma dior8wnetai kanontas 
> #include <stdlib> 
> opoy kai einai orismenh h atof.
> 
> Kai h profanhs erwthsh: giati to epa8e ayto o linker? (h atof einai sthn
> glib etsi den einai? Apo oti eida sto stdlib.h an exeis optimization sthn
> bazei inline alla ayto den dikaiologei tipota).

Na apantiso me erotisi, kati tou stul:

    "Poios einai o default typos epistrofhs enos function pou den exei
    oristei tin stigmh pou to blepei proti fora na xrhsimopoieitai o
    compiler?"
	- apantisi: int

Tora elpizo na katalabaineis oti mi bazontas to <stdlib.h>, o compiler
theorise oti to atof() epistrefei (int) kai itan san na egrapses:

	#include <stdio.h>

	int main ()
	{
		float a = (float)( (int)atof("123.45") );
		printf("%f\n", a);
		return 0;
	}

>   Apo dw kai pera gcc -Wall :-)

Ti, theleis na peis oti den exeis CFLAGS="-Wall -ansi -pedantic" sto
environment sou ?   Apapapa .... :)

-- 
Giorgos Keramidas, < keramida @ ceid . upatras . gr >
For my public key: finger keramida at ceid.upatras.gr

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