managed array or array of managed objects in Visual C++/CLI

Question

For a practice PacMan

array<bool>^ aEtats;             //declared: an array of true/false states

aEtats = gcnew array<bool>(100); //this array will correspond with an array of "Pills"

for each (bool b in aEtats)  
     b=true;

I get an array of 100 "false". Why ?

Hans Passant · Accepted Answer · 2012-09-03 16:15:31Z

1

The bool type is a value type, you get a copy of the value in the for-each statement, not a reference. So you are setting the copy to true, this doesn't propagate back to the array element. Use a simple for loop instead:

Etats = gcnew array<bool>(100);
for (int ix = 0; ix < Etats->Length; ++ix)
    Etats[ix] = true;

answered Sep 3, 2012 at 16:15

Hans Passant

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2 Comments

Ben Voigt Over a year ago

Or just change the for each loop to use a reference, e.g. for each (bool% b in aEats).

Sassinak Over a year ago

ok,thanks works, used the second solution offered since the goal is to familiarize with C++/CLI management. You should see my other question: similar confusion!

Sassinak · Accepted Answer · 2012-09-14 19:56:44Z

1

Or just change the for each loop to use a reference, e.g. for each (bool% b in aEats). – Ben Voigt

answered Sep 14, 2012 at 19:56

Sassinak

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