C++ Primer Plus习题5-6：c++中.和->的区别

代码一：

#include<iostream>
#include<string>
using namespace std;
struct Car
{
string brand;
int year;
};
void main()
{
int n,i;
cout<<"有多少记录数？";
cin>>n;
Car *cars=new Car[n];
Car *p=cars;
Car *q=cars;
for(i=0;i<n;i++)
{
cout<<"请输入生产商：";
cin>>p->brand;
cout<<"请输入生产年份：";
cin>>p->year;
p++;
}
for(i=0;i<n;i++)
{
cout<<q->brand<<" "<<q->year<<endl;
q++;
}
} 

代码二：

 

#include<iostream>
#include<string>
using namespace std;
struct Car
{
string brand;
int year;
};
void main()
{
int n,i;
cout<<"有多少记录数？";
cin>>n;
Car *cars=new Car[n];
for(i=0;i<n;i++)
{
cout<<"请输入生产商：";
cin>>cars[i].brand;
cout<<"请输入生产年份：";
cin>>cars[i].year;
}
for(i=0;i<n;i++)
{
cout<<cars[i].brand<<" "<<cars[i].year<<endl;
}
}