题目内容

#includemain() { int m=1,n=2,p=&m,q=&n,r; r=p;p=q;q=r;printf("%d,%d,%d,%d\n",m,n,p,*q); }The output of the program is ( ).

A. 1,2,1,2
B. 1,2,2,1
C. 2,1,2,1
D. 2,1,1,2

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Pointer variables cannot be used to point to elements in a struct array.

The base type of the pointer variable must be the same as the type of the struct variable.

There is the following definitions: struct sk { int a； float b； } data,*p；p =&data;, the correct reference to member a of data is ( )

A. (*p).data.a
B. (*p).a
C. p->data.a
D. p.data.a

Array element as actual paramenter of function, passing the first address of array.