Constructor Overloading in C++
C++ Constructor Overloading
Constructor Overloading in C++ is similar to Function Overloading, we can define more than one constructors for a class. It is defined by naming the constructor same as the name of the class.
Constructor Overloading in C++
The following are necessary conditions for the same –
- Name of constructor should be same as the name of the class
- The parameters passed in each variation of constructor should be different example –
- Demo(int x) and Demo(int x, int y)
- Constructors are basically special functions of the class itself.
Implementation for Constructor Overloading
Run
#include <iostream>
using namespace std;
class MyClass {
private:
int x, y;
public:
MyClass() {
x = 0;
y = 0;
}
MyClass(int a) {
x = a;
y = 0;
}
MyClass(int a, int b) {
x = a;
y = b;
}
void print() {
std::cout << "x = " << x << ", y = " << y << std::endl;
}
};
int main() {
MyClass obj1;
MyClass obj2(5);
MyClass obj3(3, 7);
obj1.print();
obj2.print();
obj3.print();
return 0;
}
Output -
x = 0, y = 0 x = 5, y = 0 x = 3, y = 7In the above example, depending upon the parameters passed( similar as function overloading), the appropriate constructor was called, this is the basic functionality of constructor overloading.
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