【c++11关键字】nullptr

/*
 * c++11关键字
 * nullptr
 * 小鱼号的代码日志
*/
#include <QCoreApplication>
#include <iostream>
using namespace  std;
void nullPointer(int *a)
{
  cout << "i am a pointer" << endl;
}
template<typename T,typename U>
void func(T t,U u)
{
    t(u);
}
int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    nullPointer(0);
    nullPointer(NULL); //(void*)0
    nullPointer(nullptr);
    func(nullPointer,nullptr);
    //func(nullPointer,NULL);///BAD
    //func(nullPointer,0); ///BAD
     func(nullPointer,(int*)0);
    return a.exec();
}