1 #include<iostream> 2 struct years 3 { 4     int year; 5 }; 6  7 int main() 8 { 9     using namespace std;10 11     years s1,s2,s3;12     s1.year=1998;13 14     years *pa=&s2;15     pa->year=1999;16 17     years trio[3];//array of 3 structures18     trio[0].year=2003;19     cout<<trio->year<<endl;20 21     const years *arp[3]={&s1,&s2,&s3};22     cout<<arp[1]->year<<endl;23 24     const years **ppa=arp;25     auto ppb=arp;//c++11 automatic type deduction26     cout<<(*ppa)->year<<endl;27     cout<<(*(ppa+1))->year<<endl;28 29     return 0;30 }

1 #include<vector>2 using namespace std;3 vector<int> vi;//设置初始长度为04 int n;5 cin>>n;6 vector<double> vd(n);//n个double的数组

1 #include<array>2 using namespace std;3 array<int,5>ai;4 array<double ,a>ad={1.2,2.1,6.43,6.5};

 1 #include<iostream> 2 #include<vector> 3 #include<array> 4 int main() 5 { 6     using namespace std; 7     double a[4]={1.2,2.4,3.6,4.8}; 8  9     vector<double>b(4);10     b[0]=1.0/3.0;11     b[1]=1.0/5.0;12     b[2]=1.0/7.0;13     b[3]=1.0/9.0;14 15     array<double,4>c={3.14,2.72,1.62,1.41};16     array<double,4>d;17     d=c;18 19     cout<<"a[2]:"<<a[2]<<" at "<<&a[2]<<endl;20     cout<<"b[2]:"<<b[2]<<" at "<<&b[2]<<endl;21     cout<<"c[2]:"<<c[2]<<" at "<<&c[2]<<endl;22     cout<<"d[2]:"<<d[2]<<" at "<<&d[2]<<endl;23 24     a[-2]=20.2;//危¡ê险?25     cout<<"a[-2]:"<<a[-2]<<" at "<<&a[-2]<<endl;26     cout<<"c[2]:"<<c[2]<<" at "<<&c[2]<<endl;27     cout<<"d[2]:"<<d[2]<<" at "<<&d[2]<<endl;28 29     return 0;30 }