no print function output do while

in my program after entering the data and select the function that will print on the screen the same is not printing ..

and if I choose 'q' or 'Q' does the program not close what is happening?
should not it work just like in C ++?

https://pastebin.com/iiMVPk4x

On 09/28/2017 08:13 AM, dark777 wrote:
> no print function output do while
> 
> in my program after entering the data and select the function that will print on the screen the same is not printing ..
> 
> and if I choose 'q' or 'Q' does the program not close what is happening?
> should not it work just like in C ++?
> 
> https://pastebin.com/iiMVPk4x

You made a simple logic error. Change the following || to &&:

    }while(choice != 'q' || choice != 'Q');

Ali

On Thursday, 28 September 2017 at 18:46:56 UTC, Ali Çehreli wrote:
> On 09/28/2017 08:13 AM, dark777 wrote:
>> no print function output do while
>> 
>> in my program after entering the data and select the function that will print on the screen the same is not printing ..
>> 
>> and if I choose 'q' or 'Q' does the program not close what is happening?
>> should not it work just like in C ++?
>> 
>> https://pastebin.com/iiMVPk4x
>
> You made a simple logic error. Change the following || to &&:
>
>     }while(choice != 'q' || choice != 'Q');
>
> Ali

I think it should not give this error

good but until now I do not understand why after I enter with data in the function add_human

the same is not printed when I choose the 'p' or 'P' option in the case

void print_list(Human[] human_list)
{
 foreach(human; human_list)
   {
    writefln("\nNome: %s",human.name);
    writefln("Peso: %0.2f",human.peso);
    writefln("Idade: %d\n",human.age);
   }
}

On 09/28/2017 12:18 PM, dark777 wrote:
> On Thursday, 28 September 2017 at 18:46:56 UTC, Ali Çehreli wrote:
>> On 09/28/2017 08:13 AM, dark777 wrote:
>>> no print function output do while
>>>
>>> in my program after entering the data and select the function that will print on the screen the same is not printing ..
>>>
>>> and if I choose 'q' or 'Q' does the program not close what is happening?
>>> should not it work just like in C ++?
>>>
>>> https://pastebin.com/iiMVPk4x
>>
>> You made a simple logic error. Change the following || to &&:
>>
>>     }while(choice != 'q' || choice != 'Q');
>>
>> Ali
> 
> I think it should not give this error
> 
> good but until now I do not understand why after I enter with data in the function add_human
> 
> the same is not printed when I choose the 'p' or 'P' option in the case
> 
> void print_list(Human[] human_list)
> {
>   foreach(human; human_list)
>     {
>      writefln("\nNome: %s",human.name);
>      writefln("Peso: %0.2f",human.peso);
>      writefln("Idade: %d\n",human.age);
>     }
> }

It's because add_human is appending to its own array. Change it to by-ref:

void add_human(ref Human[] human_list)

Ali

On Thursday, 28 September 2017 at 20:17:24 UTC, Ali Çehreli wrote:
> On 09/28/2017 12:18 PM, dark777 wrote:
>> On Thursday, 28 September 2017 at 18:46:56 UTC, Ali Çehreli wrote:
>>> On 09/28/2017 08:13 AM, dark777 wrote:
>>>> no print function output do while
>>>>
>>>> in my program after entering the data and select the function that will print on the screen the same is not printing ..
>>>>
>>>> and if I choose 'q' or 'Q' does the program not close what is happening?
>>>> should not it work just like in C ++?
>>>>
>>>> https://pastebin.com/iiMVPk4x
>>>
>>> You made a simple logic error. Change the following || to &&:
>>>
>>>     }while(choice != 'q' || choice != 'Q');
>>>
>>> Ali
>> 
>> I think it should not give this error
>> 
>> good but until now I do not understand why after I enter with data in the function add_human
>> 
>> the same is not printed when I choose the 'p' or 'P' option in the case
>> 
>> void print_list(Human[] human_list)
>> {
>>   foreach(human; human_list)
>>     {
>>      writefln("\nNome: %s",human.name);
>>      writefln("Peso: %0.2f",human.peso);
>>      writefln("Idade: %d\n",human.age);
>>     }
>> }
>
> It's because add_human is appending to its own array. Change it to by-ref:
>
> void add_human(ref Human[] human_list)
>
> Ali

while(choice != 'q' || choice != 'Q');
doesn't seem to exit the loop, while this works:
while(choice != 'q');
or
while(!(choice == 'q' || choice == 'Q'));

wouldn't it be better to use a labeled statement instead?

endless : while(true)
{
    ...

    switch(choice)
    {
        ...

        case 'Q':
        case 'q': break endless;

        ...
    }
}

On Thursday, 28 September 2017 at 21:34:46 UTC, arturg wrote:
> On Thursday, 28 September 2017 at 20:17:24 UTC, Ali Çehreli wrote:
>> On 09/28/2017 12:18 PM, dark777 wrote:
>>> On Thursday, 28 September 2017 at 18:46:56 UTC, Ali Çehreli wrote:
>>>> On 09/28/2017 08:13 AM, dark777 wrote:
>>>>> no print function output do while
>>>>>
>>>>> in my program after entering the data and select the function that will print on the screen the same is not printing ..
>>>>>
>>>>> and if I choose 'q' or 'Q' does the program not close what is happening?
>>>>> should not it work just like in C ++?
>>>>>
>>>>> https://pastebin.com/iiMVPk4x
>>>>
>>>> You made a simple logic error. Change the following || to &&:
>>>>
>>>>     }while(choice != 'q' || choice != 'Q');
>>>>
>>>> Ali
>>> 
>>> I think it should not give this error
>>> 
>>> good but until now I do not understand why after I enter with data in the function add_human
>>> 
>>> the same is not printed when I choose the 'p' or 'P' option in the case
>>> 
>>> void print_list(Human[] human_list)
>>> {
>>>   foreach(human; human_list)
>>>     {
>>>      writefln("\nNome: %s",human.name);
>>>      writefln("Peso: %0.2f",human.peso);
>>>      writefln("Idade: %d\n",human.age);
>>>     }
>>> }
>>
>> It's because add_human is appending to its own array. Change it to by-ref:
>>
>> void add_human(ref Human[] human_list)
>>
>> Ali
>
> while(choice != 'q' || choice != 'Q');
> doesn't seem to exit the loop, while this works:
> while(choice != 'q');
> or
> while(!(choice == 'q' || choice == 'Q'));
>
> wouldn't it be better to use a labeled statement instead?
>
> endless : while(true)
> {
>     ...
>
>     switch(choice)
>     {
>         ...
>
>         case 'Q':
>         case 'q': break endless;
>
>         ...
>     }
> }

It's good that it worked out here.