請幫助調試這個C++代碼繼承#constructor_error

Question

這個代碼中有一個erroe，請幫我解決它。

#include <iostream> 
    #include <string> 
    #include <iomanip> 
    using namespace std; 
    class base 
     protected: 
       double area; 
       string p_name; 
       int n_side; 
       void show_out(); 
       base(string,int); 
    }; 
    class square:public base { 
     private: 
       double length,width; 
     public: 
       void get_data(); 
       void cal_sarea(); 
       square(); 
    }; 

    class triangle:public base { 
     private: 
       double base,height; 
     public: 
       void get_data(); 
       void cal_tarea(); 
       triangle(); 
    }; 
    int main() { 
     square sob1; 
     triangle tob1; 
      sob1.get_data(); 
      sob1.cal_sarea(); 
      tob1.get_data(); 
      tob1.cal_tarea(); 
    return 0; 
    } 
    void base::show_out() { 
         cout<<setiosflags(ios::fixed|ios::showpoint)     <<setprecision(2)<<area<<endl; 
    } 
    void square::get_data() { 
         cout<<"please enter length"<<endl; 
         cin>>length; 
         cout<<"please enter width"<<endl; 
         cin>>width; 
    } 
    void square::cal_sarea() { 
      area = length * width; 
      show_out(); 
    } 
    void triangle::get_data() { 
         cout<<"please enter base of triangle"<<endl; 
         cin>>base; 
         cout<<"please enter height of the triangle"<<endl; 
         cin>>height; 
} 
void triangle::cal_tarea() { 
      area = 0.5 * base * height; 
      show_out(); 
    } 
    base::base(string name,int num) 
    :p_name(name),n_side(num) {} 

    square::square() 
     :base("square",4){} 

    triangle::triangle() // gives a errors here, it says no matching fucntion to call to base::base() 
     :base("triangle",5) {} 

Answer 1

你triangle -class有一個名爲base一個成員變量，也從一個名爲base類繼承。

編譯器正在讓這些名稱感到困惑。

爲您的成員變量命名與您的基類名稱不同。
每個項目必須有一個唯一名稱。