Question

此代码中有错误，请帮我解决。

    #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

您的triangle - 类有一个名为base的成员变量，并且还继承自名为base的类。

编译器让这些名字变得混乱。

以与基类名称不同的方式命名您的成员变量每个项目都必须具有唯一名称。

请帮助在继承#constructor_error上调试这个c ++代码

1 个答案: