Question

求答案？？

Answer 1

     With more and more cars coming into our families, we are happy that it has greatly improved our life.
But unluckily, it has also brought many problems, such as heavy traffic and traffic accidents. 
     Traffic safety is everybody's business. We must obey the rules. For example, we must walk on walk side.
when we cross zebra - crossing, stop and look right and left, then go across fast. Don’t play football on the
road .we can tell our parents not to drink before they drive, not to run through red lights, not to talk and laugh
while driving etc.
     We can say cars are coming into our life, but only when everybody thinks traffic safety is everybody's
business can we be safe driving on roads and walking on sidewalks.

追答

好评

Answer 2

这题的关键在int *ptr=(int *)(&a+1);这一句上，&a表示取得数组a存储区域的首地址，再加1表示数组a存储区域的后的地址，这就使得ptr指针指向数组的最后一个元素后面的那个存储单元的地址，而ptr减1后，再进行数据访问，则访问的是ptr指针的前一个存储单元的值，所有最后的答案是2，5

Answer 3

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