arrays - Visual C++/CLI 中的托管数组或托管对象数组

Question

练习吃豆人

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;

我得到一个包含 100 个“假”的数组。为什么 ？

Answer 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;

Answer 2

或者只是将 for each 循环更改为使用引用，例如 for each（aEats 中的 bool% b）。——本·沃伊特