技術標籤：c++

c++和就夠體相關的指標用法

struct year_end{ 
    int year; 
}; 
int main() 
{ 
    year_end y1,y2,y3; 
    year_end p[3]; 
    p[0]=y1; 
    p[1]=y2; 
    p[2]=y3; 
    y1.year=1992; 
    y2.year=1993; 
    y3.year=1994; 
     
    year_end *p1[3]; 
    p1[0]=&y1; 
    p1[1]=&y2; 
    p1[2]=&y3; 
    auto app = p1;//year_end ** q=arp; 
    cout<<(*app)->year<<endl; 
    cout<<(*(app+1))->year<<endl; 
    cout<<(*(*(app+1))).year<<endl; 
     
    
    year_end *app1=p1[0]; 
    cout<<app1->year<<endl; 
    cout<<(*(app1+1)).year<<endl; 
    cout<<(app1+2)->year<<endl; 
 
    year_end *arp[3]={&y1,&y2,&y3}; 
    year_end **q=arp;//同時去掉一個*來看或者將*q看成一個整體 
    cout<<(*q)->year<<endl;// 
    cout<<(*(q+2))->year<<endl; 
    cout<<(*(*(q+1))).year<<endl; 
    return 0; 
}