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A class in a program whose objects are created and destroyed throughout the program It is desired that the total number of live objects in the program be known how you do this in C plus plus?
Wiki User
∙ 13y ago
- Create a static member variable to contain the count. This variable is common to all instances of the class.
- Initialize that variable to zero at the beginning of the program.
- In the class constructor, increment the variable.
- In the class destructor, decrement the variable.
Wiki User
∙ 13y ago
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When you charge objects by any method no charges are?
created or destroyed
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Can we create an array of objects for a class having default constructor Justify your answer?
See example code below. #include <iostream> class x { private: // Members. static int counter; int data; public: // Default constructor and destructor. x():data(++counter){printf("Object %d created!\n",data);} ~x(){printf("Object %d destroyed!\n",data);} // other members omitted for brevity... }; // Initialise static counter. int x::counter=0; int main() { // Instantiate an array of 10 objects. x arr[10]; // .. do some work with the array .. return( 0 ); // The array falls from scope, destroying the objects. } Example output: Object 1 created! Object 2 created! Object 3 created! Object 4 created! Object 5 created! Object 6 created! Object 7 created! Object 8 created! Object 9 created! Object 10 created! Object 10 destroyed! Object 9 destroyed! Object 8 destroyed! Object 7 destroyed! Object 6 destroyed! Object 5 destroyed! Object 4 destroyed! Object 3 destroyed! Object 2 destroyed! Object 1 destroyed!
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They acquire a charge from somewhere else.
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