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digitalmars.D - Problem while copy Array Element to variable

reply Zaheer Ahmed <zaheercena gmail.com> writes:
My Dynamic array completely work good but when assign it's one 
index to a variable, it's saves ASCII of that index.
writeln(myarray); // output 24
var = myarray[0]; // it assign 50 to var
Why changed to ASCII and how to get rid of.
Jul 25 2017
parent reply =?UTF-8?Q?Ali_=c3=87ehreli?= <acehreli yahoo.com> writes:
On 07/25/2017 09:14 AM, Zaheer Ahmed wrote:

 My Dynamic array completely work good but when assign it's one index to
 a variable, it's saves ASCII of that index.
 writeln(myarray); // output 24
 var = myarray[0]; // it assign 50 to var
 Why changed to ASCII and how to get rid of.


First, just to remind you that this question would be more helpful on 
the Learn forum. :)

You're not showing any code so I try to reproduce the issue:

import std.stdio;

void main() {
     auto myarray = "24";
     writeln(myarray); // output 24
     int var;
     auto var = myarray[0]; // it assign 50 to var
     writeln(var);
}

myarray[0] has the value 50 because 50 is the ASCII code of '2'.

The reason var gets 50 in the above scenario is because var is an int. 
If you want to get char '2' (of course still with the value 50), you can 
make it char:

    char var;

On the other hand, if you want to get the integer value 2, there is the 
trick of subtracting the value of '0' from it:

     var = myarray[0] - '0';

var now has value 2.

Ali
Jul 25 2017
next sibling parent =?UTF-8?Q?Ali_=c3=87ehreli?= <acehreli yahoo.com> writes:
On 07/25/2017 10:11 AM, Ali Çehreli wrote:


     int var;
     auto var = myarray[0]; // it assign 50 to var


Remove that 'auto' please. Apparently, I edited my message instead of 
code. :p

Ali
Jul 25 2017
prev sibling parent Zaheer Ahmed <zaheercena gmail.com> writes:
On Tuesday, 25 July 2017 at 17:11:37 UTC, Ali Çehreli wrote:

 On 07/25/2017 09:14 AM, Zaheer Ahmed wrote:

 My Dynamic array completely work good but when assign it's


 one index to

 a variable, it's saves ASCII of that index.
 writeln(myarray); // output 24
 var = myarray[0]; // it assign 50 to var
 Why changed to ASCII and how to get rid of.


 First, just to remind you that this question would be more 
 helpful on the Learn forum. :)

 You're not showing any code so I try to reproduce the issue:

 import std.stdio;

 void main() {
     auto myarray = "24";
     writeln(myarray); // output 24
     int var;
     auto var = myarray[0]; // it assign 50 to var
     writeln(var);
 }

 myarray[0] has the value 50 because 50 is the ASCII code of '2'.

 The reason var gets 50 in the above scenario is because var is 
 an int. If you want to get char '2' (of course still with the 
 value 50), you can make it char:

    char var;

 On the other hand, if you want to get the integer value 2, 
 there is the trick of subtracting the value of '0' from it:

     var = myarray[0] - '0';

 var now has value 2.

 Ali


I got this with var = myarray[0] - '0'; without this I have to 
manually pollute my code.
Thanks for Solution & also for writing Book on D Lang.
Jul 25 2017