デフォルトのコンストラクター
#include<iostream>
using namespace std;
class Circle
{
private:
double radius;
public:
Circle() = default;
Circle(double r)
{
radius = r;
}
double getArea()
{
return 3.14 * radius * radius;
}
};
class Square
{
private:
double side;
public:
Square() = delete;
Square(double side)
{
this->side = side;
}
double getArea()
{
return side * side;
}
};
class Combo
{
public :
Circle c;
Square s;
Combo() :s{
1.0 }
{
s = {
8.0 };
}
};
int main()
{
return 0;
}
2.オブジェクトのインプレース初期化
#include<iostream>
#include"circle.h"
class X
{
int a = 1;
int b = {
2 };
int c{
3 };
std::string s{
'H','E','L' };
std::string s2{
"Hello" };
std::string s3 = "world";
int ARR1[3] = {
1,2,3 };
int arr2[4]{
1 };
double arr3[5]{
12.0,32.0 };
};
int main()
{
return 0;
}