相关疑难解决方法(0)

考虑一下代码:

#include <stdio.h>

class Base {
public: 
    virtual void gogo(int a){
        printf(" Base :: gogo (int) \n");
    };

    virtual void gogo(int* a){
        printf(" Base :: gogo (int*) \n");
    };
};

class Derived : public Base{
public:
    virtual void gogo(int* a){
        printf(" Derived :: gogo (int*) \n");
    };
};

int main(){
    Derived obj;
    obj.gogo(7);
}

得到此错误:

>g++ -pedantic -Os test.cpp -o test
test.cpp: In function `int main()':
test.cpp:31: error: no matching function for call to `Derived::gogo(int)'
test.cpp:21: note: candidates are: virtual …

考虑我有两个纯虚拟类，一个派生自另一个，一个具体类派生自最后一个：

#include <iostream>
#include <string>

class Abstract1
{
public:
    virtual ~Abstract1() { };
    virtual void method(int a) = 0;

protected:
    Abstract1() = default;
};

class Abstract2: public Abstract1
{
public:
    virtual ~Abstract2() { };
    virtual void method(char c, std::string s) = 0;

protected:
    Abstract2() = default;
};

class Concrete : public Abstract2
{
public:
    void method(int a) override
    {
        std::cout << __PRETTY_FUNCTION__ << "a: " << a << std::endl;
    }

    void method(char c, std::string s) override
    {
        std::cout << __PRETTY_FUNCTION__ …