C++構造繼承錯誤

Question

爲什麼下面的代碼

#include <iostream> 
using namespace std; 

class Polygon { 
    protected: 
    int width, height; 
    Polygon() 
    { 
      cout<<"Constructor with no arguments\n"; 
      width = 0; 
      height = 0; 
    } 
    Polygon(int width,int height) 
    { 
       cout<<"Constructor with 2 arguments\n"; 
       this->width = width; 
       this->height = height; 
    } 
}; 

class Rectangle: public Polygon { 
    public: 
     Rectangle(int width,int height):Polygon(width,height){} 
    int area() 
     { return width * height; } 
}; 

class Triangle: public Polygon { 
    public: 
     Trianlge(int width,int height): Polygon(width,height){} 
    int area() 
     { return width * height/2; } 
    }; 

int main() { 
    //Rectangle rect(4,4); 
    //Triangle trgl(4,4); 
    return 0; 
} 

導致這些錯誤：

test.cpp:34:39: error: ISO C++ forbids declaration of ‘Trianlge’ with no type [-fpermissive] 
      Trianlge(int width,int height): Polygon(width,height){} 
            ^
test.cpp: In member function ‘int Triangle::Trianlge(int, int)’: 
test.cpp:34:42: error: only constructors take member initializers 
      Trianlge(int width,int height): Polygon(width,height){} 
             ^
test.cpp:34:64: warning: no return statement in function returning non-void [-Wreturn-type] 
      Trianlge(int width,int height): Polygon(width,height){} 

它與構造函數的繼承問題。每次創建矩形或三角形時，我都想調用Polygon的構造函數。但是，我發現類Rectangle和Triangle非常相似，我只在Triangle上出錯，而​​在Rectangle上出錯。您能否向我解釋錯誤的原因以及如何解決？

Answer 1

您在這裏有一個錯字你Triangle類中

Trianlge(int width,int height): Polygon(width,height){} 
^
^