#include <iostream>
using namespace std;
int main()
{
    //指针所占用的内存空间大小
    int a = 10;
    int* p = &a;
    //32位操作系统，指针占用4个字节空间大小，不管什么数据类型
    //64位操作系统，指针占用8个字节空间大小；
    cout << "sizeof(p)=" << sizeof(p) << endl;
    cout << "sizeof(int *)=" << sizeof(int*) << endl;
    cout << "sizeof(float *)=" << sizeof(float*) << endl;
    cout << "sizeof(double *)=" << sizeof(double*) << endl;
    cout << "sizeof(char *)=" << sizeof(char*) << endl;

    system("pause");
    return 0;
}