指针的运算

#include<stdio.h>
int main()
{
    int b = 0;
    int *p1 = &b;
    printf("%p, %p, %p\n", p1, p1 + 1, p1 + 2);
    
    int a[10] = { 0 };
    int *p = a;  //定义一个指针等于a数组 
    p += 5;  //指针+5，相当于p = 0 + 5 ;
    *p = 100;   
    p -= 2;   //相当于p = 5 - 2;
    *p = 200;
    
    int i;
    for(i = 0; i < 10; i++)
    {
        printf("a[%d] = %d\n", i, a[i]);
    }
    return 0;
 }