数组指针操作一维二维数组

//数据类型是带有地址大小别名
int array842(){
typedef char (*ptr)[3];
char a[3] = {"aba"};
ptr p = &a;//将整个数组a的地址赋给数组指针p

//取地址
printf("[%d]:%p\n",1,&a);
printf("[%d]:%p\n",2,*p);
printf("[%d]:%zi\n",3,*(p+1)-(*p));//步长为数组长度3

//取值
printf("[%d]:%c\n",4,(*p)[1]);//不等于*p[i]
printf("[%d]:%c\n",5,*(*p+1));
printf("[%d]:%c\n",6,*p[1]);//*p[i]
return 0;
}
output:
[1]:0x7fff5fbff7dd
[2]:0x7fff5fbff7dd
[3]:3
[4]:b
[5]:b
[6]:
int array844(){
typedef char (*ptr)[3];//步长3和a[x][y]的y值相等
char a[3][3] = {"aba","bah","cbc"};
ptr p = a;//a的地址标示第一个数组的开始地址

printf("%c\n",*(*(p+1)+2));
printf("%c\n",*(p[1]+2));
printf("%p\n",*(p+1));
printf("%p\n",p[1]);
return 0;
}
output:
h
h
0x7fff5fbff7d2
0x7fff5fbff7d2