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#include <stdio.h>
//体会数组和指针的差别
//体会指针的指针的概念
//指针的指针,的值一定是一个地址值,如果不是地址,就说明你可能错了
//指针是一个特殊的变量,有自己的地址,值,和名字
//数组则是一个结构,不是一个变量,因此没有自己的值,它只是变量的集合
//事实上它只有自己的名字,而地址值是第一个变量的地址值,和其本身无关?
int main(){
int a[3] = {1,2,3};
int* pa = a;
int (*ppa)[3] = &a;
int i = 0;
int b = 'A';
int* pi = 0x12FF68;
printf("&i is %X \n",&i);
printf("*&i is %d \n",*&i);
printf("*&b is %c \n",*&b);
printf("*pi is %d \n", *pi);
printf("-----------------------------\n");
printf("a value is %X \n",a);
printf("pa value is %X \n",pa);
printf("ppa value is %X \n",ppa);
printf("*ppa value is %X \n",*ppa);
printf("-----------------------------\n");
printf("*a value is %d \n",*a);
printf("*pa value is %d \n",*pa);
printf("*ppa value is %X \n",*ppa);
printf("-----------------------------\n");
printf("&a value is %X \n",&a);
printf("&pa value is %X \n",&pa);
printf("&ppa value is %X \n",&ppa);
printf("-----------------------------\n");
for(i = 0; i<3;i++){
printf("a[%d] is : %d \n",i,a[i]);
}
printf("-----------------------------\n");
for(i = 0; i<3;i++){
printf("*(a+%d) is : %d \n",i,*(a+i));
}
printf("-----------------------------\n");
for(i = 0; i<3;i++){
printf("*(pa+%d) is : %d \n",i,*(pa+i));
}
printf("-----------------------------\n");
for(i = 0; i<3;i++){
printf("*(*ppa+%d) is : %d \n",i,*(*ppa+i));
}
}
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