c++ create static instance of class code example
Example 1: static class in C++
#include <iostream>
using namespace std;
class Box {
public:
static int objectCount;
Box(double l = 2.0, double b = 2.0, double h = 2.0) {
cout <<"Constructor called." << endl;
length = l;
breadth = b;
height = h;
objectCount++;
}
double Volume() {
return length * breadth * height;
}
static int getCount() {
return objectCount;
}
private:
double length;
double breadth;
double height;
};
int Box::objectCount = 0;
int main(void) {
cout << "Inital Stage Count: " << Box::getCount() << endl;
Box Box1(3.3, 1.2, 1.5);
Box Box2(8.5, 6.0, 2.0);
cout << "Final Stage Count: " << Box::getCount() << endl;
return 0;
}
Example 2: static class in C++
#include <iostream>
using namespace std;
class Box {
public:
static int objectCount;
Box(double l = 2.0, double b = 2.0, double h = 2.0) {
cout <<"Constructor called." << endl;
length = l;
breadth = b;
height = h;
objectCount++;
}
double Volume() {
return length * breadth * height;
}
private:
double length;
double breadth;
double height;
};
int Box::objectCount = 0;
int main(void) {
Box Box1(3.3, 1.2, 1.5);
Box Box2(8.5, 6.0, 2.0);
cout << "Total objects: " << Box::objectCount << endl;
return 0;
}