第四阶段—一级指针的特点：unsigned int data = 0x11223344; unsigned short *q = NULL; unsigned short t1 = 0; unsigned short t2 = 0; 1. 要求指针q保存data的地址. 2. 要求利用q读取data的低2个字节赋值給t1 要求利用q读取data的高2个字节赋值給t2