text: #include <iostream>
  #include <pthread.h>
  #include "CSingleton.h"
  using namespace std;
  
  int main() {
      int i = 0;
      CSingleton* p[4];
      while(i < 4) {
          p[i] = CSingleton::getInstance();
  	printf("%p\n", p[i]);
  	++i;
      }
  
      delete p[i-1];
      
      return 0;
  }
  