Initialize member variable in constructor : member variable « Class « C++ Tutorial

1. C++ Tutorial
2. Class
3. member variable

#include <iostream>
using namespace std;
class MyClass
{
   public: 
     MyClass::MyClass(void);
     void show_MyClass(void);
   private:
     int a;
     int b;
     int c;
};

MyClass::MyClass(void) : a(1), b(2), c(3) { };

void MyClass::show_MyClass(void)
{
   cout << "a contains: " << a << endl;
   cout << "b contains: " << b << endl;
   cout << "c contains: " << c << endl;
}

int main(void)
{
   MyClass numbers;

   numbers.show_MyClass();
}