:: Re: [DNG] continuing in C programmi…
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Auteur: Marc Shapiro
Datum:  
Aan: dng
Onderwerp: Re: [DNG] continuing in C programming
On 10/13/24 1:45 PM, o1bigtenor via Dng wrote:
> Greetings
>
> (using gcc compiler - - just in case that makes a difference
>     book is 'Modern C')

>
> program is :
>
> /* This may look like nonsense, but really is -*- mode: C -*- */
> #include <stdlib.h>
> #include <stdio.h>
>
> /* The main thins that is program does. */
> int main(void) {
>     //Declarations
>     double A[5] = {
>        [0] = 9.0,
>        [1] = 2.9,
>        [4] = 3.E+25,
>        [3] = .00007,
>     };

>
>     //Doing some work
>     for (size_t i=0; i < 5; ++i) {
>        printf("element_%zu_is_%g,_\tits_square_is_%g\n",
>               i,
>               A[i],
>               A[i]*A[i]);
>     }

>
>     return EXIT_SUCCESS;
> }

>
> When I run it I'm getting :
>
> $ ./firstprogram
> element_0_is_9,_    its_square_is_81
> element_1_is_2.9,_    its_square_is_8.41
> element_2_is_0,_    its_square_is_0
> element_3_is_7e-05,_    its_square_is_4.9e-09
> element_4_is_3e+25,_    its_square_is_9e+50

>
> I don't think all the underscores are supposed to be there - - - what
> did I do wrong?


It's been a while since I used C, but... you have underscores in your
printf call, so they are being treated as literals and being printed. 
Change those underscores to spaces, and I think you should be OK.


Marc