f(NULL)

#include <iostream>
#include <exception>
using namespace std;

void f(int x)
{
 cout<<"void f(int x)"<<endl;
}

void f(int *p)
{
 cout<<"void f(int *p)"<<endl;
}
int main()
{
 //int *p = NULL;
 //f(p);
 f(NULL);
 return 0;
}

[vs2005]输出结果：void f(int x)