设有下列语句: ()表达式的值为6. struct st {int n; struct st *next;}; static struct st a[3]={ 5,a[1], 7,a[2], 9,NULL}, *p; p=a[0];A.++p->nB.(p)->nC.(*p).n++D.p++->n

设有下列语句: ()表达式的值为6. struct st {int n; struct st *next;}; static struct st a[3]={ 5,&a[1], 7,&a[2], 9,NULL}, *p; p=&a[0];

A.++p->n

B.(p)->n

C.(*p).n++

D.p++->n


参考答案和解析
int* f(int*(*fp)(int *, int)){return fp(nullptr,3); }

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