C++ examples for Class:Member Field
Static class member field data
#include <iostream> using namespace std; class foo//from w w w. j ava 2s . co m { private: static int count; //only one data item for all objects //note: *declaration* only! public: foo() //increments count when object created { count++; } int getcount() //returns count { return count; } }; int foo::count = 0; //*definition* of count int main() { foo f1, f2, f3; //create three objects cout << "count is " << f1.getcount() << endl; //each object cout << "count is " << f2.getcount() << endl; //sees the cout << "count is " << f3.getcount() << endl; //same value return 0; }