Question

你能帮我理解我做错了什么。我有NetBeans，MinGW编译器和Qt库。

*的 Figure.h *

class Figure: public QObject{ //18
    Q_OBJECT
        public:
                Figure(); //32               
};

Figure.cpp

Figure:: Figure(){   // 16              
}

错误消息是：

Figure.h:18:7: error: candidates are: Figure::Figure(const Figure&)
Figure.h:32:17: error:                 Figure::Figure()
Figure.cpp:16:1: error: prototype for 'Figure::Figure()' does not match any in class    'Figure'

顺便说一下，我试图遵循这个Figure(const Figure&)模式。它不起作用。

稍后添加（按照要求提供更多代码）：

Figure.h

#ifndef FIGURE_H
#define FIGURE_H
#include <QtGui/QApplication>
#include <QFrame>
#include <initializer_list>

#pragma once

enum colours {RED, GREEN, BLUE, YELLOW, MAGENTA};

class Figure: public QObject{
    Q_OBJECT
        public:
                int shape[4][4]; 
        private:                
                int previous_shape;
                int current_shape;
                int current_x; 
                int current_y; 
                int previous_x;
                int previous_y;
                colours colour;     

        public:
                Figure();                
                int testint;
                int test[2];                
                void change_figure();
                void roll_back(); 
                void set_coordinates(int direction);
                void set_colour();
                void rotate();
                int get_x();
                int get_y();
                int* get_shape();

//        signals:
//                void transmitInfo();            
};

Figure.cpp

#include "Figure.h"
#include <cstdlib> 
#include <QtGui> 
#include <QtGui/QApplication> 
#include <iostream>
#include <initializer_list>
template <class T>

Figure:: Figure(){         

        //shape = {{1, 1}, {1, 1}};
        previous_shape = 1;
        current_shape = 1;
        current_x = 5;
        current_y = 5;
        previous_x = 5;
        previous_y =5; 
        colour = RED;   
}

Answer 1

在template <class T>定义之前.cpp文件中Figure::Figure()执行此操作的内容是什么？您的Figure类未在.h文件中声明为模板。

'Figure :: Figure（）'的原型与类'Figure'中的任何一个都不匹配

1 个答案: