質問編集履歴
2
誤字修正
test
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━━━━━ Actualクラス ━━━━━
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1 #ifndef ACTUAL
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2 #define ACTUAL
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4 #include "callback.h"
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6 class Callback;
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7 class Actual {
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8 public:
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9 int get() {
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10 return 3;
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11 }
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12 Callback *callback;
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13 };
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15 #endif
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━━━━━ Callbackクラス ━━━━━
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1 #ifndef CALLBACK
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2 #define CALLBACK
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4 #include "logic.h"
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6 class Logic;
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7 class Callback {
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8 public:
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9 void func() {
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10 logic->print();
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11 }
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12 Logic *logic;
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13 };
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15 #endif
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━━━━━ Logicクラス ━━━━━
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1 #ifndef LOGIC
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2 #define LOGIC
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4 #include <iostream>
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5 #include "actual.h"
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6 using namespace std;
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8 class Actual;
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9 class Logic {
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10 public:
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11 void print() {
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12 cout << actual->get() << endl;
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13 }
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14 Actual *actual;
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15 };
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17 #endif
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1
エラー出力を追記しました
test
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File without changes
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test
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@@ -18,7 +18,7 @@
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5 public:
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6 int get() {
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7 return 3;
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5 int main() {
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6 Actual actual;
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7 Callback callback;
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```
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エラー出力を以下に示します。
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```
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In file included from callback.h:4:0,
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from actual.h:4,
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from main.cpp:1:
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logic.h: In member function ‘void Logic::print()’:
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logic.h:12:17: error: invalid use of incomplete type ‘class Actual’
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cout << actual->get() << endl;
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^~
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logic.h:8:7: note: forward declaration of ‘class Actual’
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class Actual;
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```
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解消方法をご存知の方がおりましたら、教えて頂けると幸いです。
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