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char**p = NULL;
*p = (unsigned char*)malloc(10);
(*p)[0] = 'a';//正确做法
*p[0] = 'b';//出错
*p[0]等价于*(p[0]), 因为[]的优先级高于*
char**p = NULL;
*p = (unsigned char*)malloc(10);
(*p)[0] = 'a';//正确做法
*p[0] = 'b';//出错
*p[0]等价于*(p[0]), 因为[]的优先级高于*