off topic: Doubt about gcc 3.3.3 and ( getchar() or scanf(%s) )?

[Michael D. Setzer II]

It appears that when you use the getchar and type the option and 
enter, it returns the character and a LF. I added some things to 
yours, and it runs. I type a for the first option, and it prints A for the 
first option, and then prints 10 (decimal format) of option2. Then 
enter b for the scanf, and it prints out b

Not sure why it is including the LF with the getchar.

void main()
{
        char option,option2;
        printf("Choose an option:");
        option=toupper(getchar());
        printf("%c\n",option);
        option2=getchar();
        printf("Option2 %d\n",option2);
        printf("Choose another option:");
        scanf("%c",&option);
        printf("%c\n",option);
}



On 12 Oct 2004 at 16:44, Vinicius wrote:

From:           	Vinicius <cviniciusm at terra.com.br>
To:             	For users of Fedora Core releases <fedora-list at redhat.com>
Date sent:      	Tue, 12 Oct 2004 16:44:24 -0300
Subject:        	off topic: Doubt about gcc 3.3.3 and ( getchar() or scanf(%s) )?
Send reply to:  	For users of Fedora Core releases <fedora-list at redhat.com>
	<mailto:fedora-list-request at redhat.com?subject=unsubscribe>
	<mailto:fedora-list-request at redhat.com?subject=subscribe>

> Hello,
> 
> the following code does not work:
> "
> ...
> void main(void)
> {
>   char option;
> 
>   printf("Choose an option: ");
>   
>   option = toupper(getchar());
> 
>   printf("Chosse another option: ");
> 
>   scanf("%c", &option);
> 
>   ...
> 
> 
> It shows "Choose an option: Choose another option ". Why?
> Whether I put two lines "fflush(stdin)" before the inputs, the same
> above occurs.
> 
> my gcc: "$ gcc --version
> gcc (GCC) 3.3.3 20040412 (Red Hat Linux 3.3.3-7)"
> 
> TIA, Vinicius.
> 
> P.S.: Where is the best place to put this question, p ease?
> 
> -- 
> fedora-list mailing list
> fedora-list at redhat.com
> To unsubscribe: http://www.redhat.com/mailman/listinfo/fedora-list
> 


+----------------------------------------------------------+
  Michael D. Setzer II -  Computer Science Instructor      
  Guam Community College  Computer Center                  
  mailto:mikes at kuentos.guam.net                            
  http://www.guam.net/home/mikes
  Guam - Where America's Day Begins                        
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