C++のclassのメソッド呼び出しのお勉強 https://wandbox.org/permlink/OBeuz8iRwQUwjqM7

run_result.txt

Start

d = 114514
3
10
924

0

Finish

test.cpp

#include <iostream>

class Base {
    public:
        Base(int a, int b);
        Base(std::string a, std::string b);
        int plus(int a, int b);
        int plus(std::string a, std::string b); // Polymorphism
        int getC(void);
        int getD(void);
    private:
        int c;
        int d;
};

Base::Base(int a, int b):
    // initializer lists (see http://en.cppreference.com/w/cpp/language/initializer_list)
    c{plus(a, b)},
    d{114514}
{
}

Base::Base(std::string a, std::string b):
    c{plus(a, b)},
    d{810}
{
}

int Base::plus(int a, int b){
    return a + b;
}

int Base::plus(std::string a, std::string b){
    return std::stoi(a) + std::stoi(b);
}

int Base::getC(void){
    return c;
}

int Base::getD(void){
    return d;
}

int main(){
    Base m(1,2);
    // std::cout << "d = " << m.d << std::endl; // compile error, "error: 'int Base::d' is private within this context"
    std::cout << "d = " << m.getD() << std::endl;
    std::cout << m.getC() << std::endl;
    std::cout << (new Base(1,9))->getC() << std::endl;
    std::cout << (new Base("810","114"))->getC() << std::endl;
}