C++ 计数器类示例：使用静态成员实现计数

#include using namespace std;

class Counter { private: static int num; public: static int get() { return num; } void inc() { num++; }; };

int Counter::num = 10;

int main() { Counter A, B; cout << Counter::get() << endl; cout << Counter::get() << endl; B.inc(); cout << A.get() << endl; cout << Counter::get() << endl; return 0; }