回答編集履歴
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追記
test
CHANGED
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@@ -7,3 +7,61 @@
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関数test内で仮引数bを書き換えると、呼び出し元の実引数aの値にも影響します。
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```C
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13
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#include <iostream>
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void func_val(int arg) {
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arg = 1;
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}
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void func_ref(int &arg) {
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arg = 2;
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}
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int main(void) {
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int val = 0;
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std::cout << val << "\n";
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func_val(val);
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std::cout << val << "\n";
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func_ref(val);
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std::cout << val << "\n";
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return 0;
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}
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```
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**実行結果** [Wandbox](https://wandbox.org/permlink/Ml2LkfLXZSPH5ep8)
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58
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```
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61
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0
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0
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64
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2
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```
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