What is the explicit Invocation in Constructors

Explicit Invocation   Constructors and destructors can be invoked (called) explicitly from the main() function. A constructor can be invoked as shown below:   ClassName(params-list );   For example, constructor of Student class can be called as shown below:   Student( );   In case of a destructor, we need to write the class name along with the destructor name as follows:   object_name.ClassName::~ClassName( );   or   object_name.~ClassName( );   For example, destructor of Student class can be called as follows:   s1.~Student( );   A destructor can be called from a constructor as follows: 1 2 3 4

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What is the explicit Invocation in Constructors
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