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写出下列程序的执行结果是：__________________。#include using namespace std;struct Node{ char * s ; Node * q ;} ;void main(){ Node a[ ] = { { "Mary", a+1 }, { "Jack", a+2 }, { "Jim", a } } ; Node *p = a ; cout << p->s <<","; cout << p->q->s <<","; cout << p->q->q->s <<","; cout << p->q->q->q->s << endl ;}

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