member initializer list in c++
// Constructor Member Initializer List
#include <iostream>
class Example
{
private:
int x, y;
public:
Example() : x(0), y(0) {}
Example(int x1, int y1) : x(x1), y(y1) {}
~Example() {}
};
int main()
{
Example e;
}initialization list c++
struct S {
int n;
S(int); // constructor declaration
S() : n(7) {} // constructor definition.
// ": n(7)" is the initializer list
};
S::S(int x) : n{x} {} // constructor definition. ": n{x}" is the initializer list
int main() {
S s; // calls S::S()
S s2(10); // calls S::S(int)
}c++ class member initializer list
#include <iostream>
class Entity {
private :
std::string m_Name;
int m_Score;
int x, y, z;
public:
Entity()
:m_Name("[Unknown]"),m_Score(0),x(0),y(0),z(0)//initialize in the order of how var are declared
{
}
Entity (const std::string& name)
:m_Name(name)
{}
const std::string& GetName() const { return m_Name; };
};
int main()
{
Entity e1;
std::cout << e1.GetName() << std::endl;
Entity e2("Caleb");
std::cout << e2.GetName() << std::endl;
std::cin.get();
}c++ initialization list
class Something
{
private:
int m_value1;
double m_value2;
char m_value3;
public:
Something()
{
// These are all assignments, not initializations
m_value1 = 1;
m_value2 = 2.2;
m_value3 = 'c';
}
};initializer list c++
class Example {
public:
int m_A, m_B, m_C;
Example(int a, int b, int c);
};
Example::Example(int a, int b, int c):
// This is an initializer list
m_A(a),
m_B(b),
m_C(c)
{ /* Constructor code */ }Copyright © 2021 Codeinu
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