Array
int a[10];
or
#define SIZE 10
int a [SIZE];
Tyical Operations
1，access：
for loop a[i]
2，left/right shift
for loop，a[i] = a[i + 1]，or a[i] = a[i - 1]。Attention to the order of sequence of operations
Remarks：
1，In case of array as function argument，the array can be accessed in function, because the array name itself is the address of the array.
2，array can not be assigned such as b = a;，INVALID!
3，Do NOT use int a[n];！！！
