代码

#include <iostream>
using namespace std;


int main()
{
	//指针所占内存空间
	int a = 10;
	//int*p;
	//p = &a;

	int* p = &a;


	//在32为操作系统下，指针占4个字节空间大小
	//在64为操作系统下，指针占8个字节空间大小
	cout << "sizeof(int*)= " << sizeof(int*) << endl;
	cout << "sizeof(int*)= " << sizeof(float*) << endl;
	cout << "sizeof(int*)= " << sizeof(double*) << endl;
	cout << "sizeof(int*)= " << sizeof(char*) << endl;
	system("pause");

	return 0;
}