c数组访问方式

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	int arr[5] = { 0,1,2,3,4};
	int len = sizeof(arr) / sizeof(int);
	int *p=arr;
	//指针遍历1
	printf("指针遍历1\n");
	for (; p < arr + len; ++p)
	{
		
		printf("%#x,%d\n", p, *p);
	}
	//指针遍历2
	p = arr;
	printf("指针遍历2\n");
	for (int i=0; i < len; ++i)
	{
		
		printf("%#x,%d\n", p + i, *(p + i));
	}
	//下标遍历
	p = arr;
	printf("下标遍历\n");
	for (int i = 0; i < len; ++i)
	{
		 //等价于printf("%#x,%d\n", a + i, a[i]);
		printf("%#x,%d\n", p + i, p[i]);
	}
	//逆向遍历，反向输出
	printf("反向遍历\n");
	for (p = arr + len - 1; p >= arr; --p)
	{

		printf("%#x,%d\n", p, *p);
	}

out:

指针遍历1
0x133fbc4,0
0x133fbc8,1
0x133fbcc,2
0x133fbd0,3
0x133fbd4,4
指针遍历2
0x133fbc4,0
0x133fbc8,1
0x133fbcc,2
0x133fbd0,3
0x133fbd4,4
下标遍历
0x133fbc4,0
0x133fbc8,1
0x133fbcc,2
0x133fbd0,3
0x133fbd4,4
反向遍历
0x133fbd4,4
0x133fbd0,3
0x133fbcc,2
0x133fbc8,1
0x133fbc4,0