本人C++小白，初学C++，QT，想向各位大神请教下QT调用C++的dll 问题

Question

我的做法：（1）右键工程-添加了头文件，在MainWindow.cpp中#include 了头文件
（2）pro中，最后添加了 LIBS +=-LD:/study/QT_Test/Test/DLLTest/Dll/-l库名（没有后缀）
（3）//Enhance 是我库中文件
//__declspec(dllexport) bool Enhance(unsigned char *pInput, unsigned char *pOutput, int nWidth, int nHeight, float fMin = 0.01f, float fMax = 0.01f);

                                        我的调用：
                                            void MainWindow::on_pushButton_clicked()

{
unsigned char *p=(unsigned char *)malloc(sizeof (unsigned char));
unsigned char *q=(unsigned char *)malloc(sizeof (unsigned char));
qDebug()<<Enhance(p,q,350,200,0.01f,0.01f);

}

 出现的问题：（1）mainwindow.obj:-1: error: LNK2019: �޷��������ⲿ���� "bool __cdecl Enhance(unsigned char *,unsigned char *,int,int,float,float)" (?Enhance@@YA_NPEAE0HHMM@Z)���÷����ں��� "private: void __cdecl MainWindow::on_pushButton_clicked(void)" (?on_pushButton_clicked@MainWindow@@AEAAXXZ) �б�����
    （2）debug\Dll.exe:-1: error: LNK1120: 1 ���޷��������ⲿ����
请问各位大神这些问题的原因是什么？怎样改正

Answer 1

https://blog.csdn.net/naibozhuan3744/article/details/78816973