在c中,什么意思是sizeof().. [ - 1]

Question

我想了解下面的代码片但是我无法解决它,(特别是)

void fun(char **p)
{
  char *t;
  t = (p+= sizeof(int))[-1]; //especially this line,why there is "-1" in here?
  printf("%s\n", t);
}

谢谢你的时间.

Answer 1

该

t = (p+= sizeof(int))[-1];

可以改写为

p += sizeof(int); /* The logic of this doesn't make a whole lot of sense to me */
t = *(p - 1);

希望这可以解决问题.