面试---指针与地址

#include <iostream>
using namespace std;
int main()
{
int a[3]={0,1,2};
int *p, *q;
p = a;
q = &a[2];
cout<<p<<endl;
cout<<q<<endl;
cout<<q-p<<endl;// q-p的实际运算是(q地址值 - p地址值)/sizeof(int) = 8/4=2
cout <<a[q-p] <<endl;
return 0;
}

0x28fefc
0x28ff04 //16进制地址值直接运算的结果是8！！！但是指针q-p运算得2！！！
2
2

Process returned 0 (0x0)   execution time : 0.129 s
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