#include “pch.h”
#include < iostream>
#include < vector>
#include < array>
int main()
{
using namespace std;
double a1[4] = { 1.2,2.4,3.6,4.8 };
vector<double> a2(4);
a2[0] = 1.0 / 3.0;
a2[1] = 1.0 / 5.0;
a2[2] = 1.0 / 7.0;
a2[3] = 1.0 / 9.0;
array<double, 4> a3 = { 3.14,2.72,1.62,1.41 };
array<double, 4> a4;
a4 = a3;
cout << " a1[2] : " << a1[2] << " at " << &a1[2] << endl;
cout << " a2[2] : " << a2[2] << " at " << &a2[2] << endl;
cout << " a3[2] : " << a3[2] << " at " << &a3[2] << endl;
cout << " a4[2] : " << a4[2] << " at " << &a4[2] << endl;
a1[-2] = 20.2;
cout << "a1[-2]:" << a1[-2] << " at " << &a1[-2] << endl;
cout << "a3[2] : " << a3[2] << " at " << &a3[2] << endl;
cout << "a4[2] : " << a4[2] << " at " << &a4[2] << endl;
return 0;
}
输出结果：
a1[2] : 3.6 at 006FF8A4
a2[2] : 0.142857 at 000A5418
a3[2] : 1.62 at 006FF864
a4[2] : 1.62 at 006FF83C
a1[-2]:20.2 at 006FF884
a3[2] : 1.62 at 006FF864
a4[2] : 1.62 at 006FF83C
（按ctrl+F5运行时出现该窗口）