原创 VC2005(5)-------------指针

#include "stdafx.h"
#include "iostream"
#include <iomanip>
#include<stdlib.h>
//using std::cin;
//using std::cout;
//using std::setw;
//using std::endl;
//#define n 5
using namespace std;
int _tmain(int argc, _TCHAR* argv[])
{
 int i,m[]={0,1,2,3,4,5,6,7,8,9};
 int *p=&m[0];
 cout<<*p<<endl; //0
 cout<<*p++<<endl;//0
 cout<<*p<<endl;//1 指针指在1的位置 
 cout<<*++p<<endl;//2指针指到2的位位置
 cout<<*p<<endl;  //2
 cout<<p<<endl;
 cout<<&*p<<endl;
 cout<<*(++p)++<<endl;//3
 cout<<*p<<endl;//指向4
 cout<<++*p++<<endl;//指向5
    return 0;
}

++的优先级别高于*

指针与字符串

#include "stdafx.h"
#include "iostream"
#include <iomanip>
#include<stdlib.h>
//using std::cin;
//using std::cout;
//using std::setw;
//using std::endl;
//#define n 5
using namespace std;
int _tmain(int argc, _TCHAR* argv[])
{   char x[3]={'q','q','\0'};
    char *p="i am a boy";
 cout<<p<<endl;
 cout<<x<<endl;
 
    return 0;
}

输出为：

i am a boy

qq

指针与引用，

引用其实就是一个变量的别名

#include "stdafx.h"
#include "iostream"
#include <iomanip>
#include<stdlib.h>
//using std::cin;
//using std::cout;
//using std::setw;
//using std::endl;
//#define n 5
using namespace std;
int _tmain(int argc, _TCHAR* argv[])
{  
 int i="10";
 int &ir=i;
 cout<<ir<<endl;//10
 int *p=&ir;
 cout<<*p<<endl;//10
 p=&ir;
 cout<<*p<<endl;//10
 int x="3";
 p=&x;
 cout<<*p<<endl;//3
 
 
    return 0;
}