[問題] header 與 incomplete type is not allowed
程式碼中有一行如下
PageManager *pageManager= PageManager::getInstance();
compile結果是incomplete type is not allowed
於是我先改成下面這行 試試看
PageManager *pageManager=NULL;
結果 compile 過了
最後試了很久發現要加上
#include "PageManager.hpp"
PageManager *pageManager= PageManager::getInstance();
這樣這行才會過
覺得奇怪的是如果 PageManager 沒被include到
那應該PageManager *pageManager=NULL;就已經錯了
請問為什麼宣告可過 但加上後面的函式就錯了？
(補充：原本的程式碼 header 包很多層 叫做PageManager.hpp的也有好幾個)
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