指针和引用的区别的简单测试

#include "stdafx.h" #include <iostream> using namespace std;

int main(int argc, char* argv[]) {     int ival = 1024;   int *p  = &ival; // a pointer   int &rval = ival; // a reference

  int jval = 4096;   int xval = 8192;      cout << "ival = " << ival << "/t";   cout << "&ival = " << &ival << "/t";   cout << endl;   cout << "p = " << p << "/t";   cout << "&p = " << &p << "/t";   cout << "*p = " << *p << "/t";   cout << endl;   cout << "rval = " << rval << "/t";   cout << "&rval = " << &rval << "/t";   cout << endl;   cout << "jval = " << jval << "/t";   cout << "&jval = " << &jval << "/t";   cout << endl;   cout << endl;      cout << "改变指针 p = &jval;" << endl;   cout << "改变引用 rval = jval" << endl;   // change the values of the reference and the pointer   p = &jval;   rval = jval;      // print the changes   cout << "ival = " << ival << "/t";   cout << "&ival = " << &ival << "/t";   cout << endl;   cout << "p = " << p << "/t";   cout << "&p = " << &p << "/t";   cout << "*p = " << *p << "/t";   cout << endl;   cout << "rval = " << rval << "/t";   cout << "&rval = " << &rval << "/t";   cout << endl;   cout << "jval = " << jval << "/t";   cout << "&jval = " << &jval << "/t";   cout << endl;      cout << endl;   cout << "通过指针改变指针指向的实例的值 *p = xval" << endl;   *p = xval;   cout << "p = " << p << "/t";   cout << "&p = " << &p << "/t";   cout << "*p = " << *p << "/t";   cout << endl;   cout << "jval = " << jval << "/t";   cout << "&jval = " << &jval << "/t";   cout << endl;    printf("any char to close");  getchar();

 return 0; }

ival = 1024 &ival = 0013FF7C  p = 0013FF7C &p = 0013FF78 *p = 1024  rval = 1024 &rval = 0013FF7C  jval = 4096 &jval = 0013FF70 

改变指针 p = &jval; 改变引用 rval = jval ival = 4096 &ival = 0013FF7C  p = 0013FF70 &p = 0013FF78 *p = 4096  rval = 4096 &rval = 0013FF7C  jval = 4096 &jval = 0013FF70 

通过指针改变指针指向的实例的值 *p = xval p = 0013FF70 &p = 0013FF78 *p = 8192  jval = 8192 &jval = 0013FF70