笔试必考：关于数组的一些计算

#include<stdio.h>
#include<unistd.h>
#include<string.h>

int main()
{
  //一维数组
  //本系统为64位
  //int a[] = {1,2,3,4};
  //printf("16::%ld\n",sizeof(a));
  //printf("8::%ld\n",sizeof(a+0));//地址
  //printf("4::%ld\n",sizeof(*a));
  //printf("8::%ld\n",sizeof(a+1));//地址
  //printf("4::%ld\n",sizeof(a[1]));
  //printf("8::%ld\n",sizeof(&a));
  //printf("8::%ld\n",sizeof(&a+1));
  //printf("8::%ld\n",sizeof(&a[0]));
  //printf("8::%ld\n",sizeof(&a[0]+1));


  char arr[] = {'a','b','c','d','e','f'};
  //printf("6::%ld\n", sizeof(arr));
  //printf("8::%ld\n", sizeof(arr+0));
  //printf("1::%ld\n", sizeof(*arr));
  //printf("1::%ld\n", sizeof(arr[1]));
  //printf("8::%ld\n", sizeof(&arr));
  //printf("8::%ld\n", sizeof(&arr+1));
  //printf("8::%ld\n", sizeof(&arr[0]+1));
  

  //printf("6::%ld\n",strlen(arr));
  //printf("6::%ld\n", strlen(arr+0));
  ////printf("%ld\n", strlen(*arr));
  ////printf("%ld\n", strlen(arr[1]));
  //printf("6::%ld\n", strlen(&arr));
  //printf("0::%ld\n", strlen(&arr+1));
  //printf("5::%ld\n", strlen(&arr[0]+1));
  
  //char *p = "abcdef";
  //printf("8::%lu\n", sizeof(p));
  //printf("8::%lu\n", sizeof(p+1));
  //printf("1::%lu\n", sizeof(*p));
  //printf("1::%lu\n", sizeof(p[0]));
  //printf("8::%lu\n", sizeof(&p));
  //printf("8::%lu\n", sizeof(&p+1));
  //printf("8::%lu\n", sizeof(&p[0]+1));
  //printf("6::%lu\n", strlen(p));
  //printf("5::%lu\n", strlen(p+1));
  ////printf("$::%lu\n", strlen(*p));
  ////printf("$::%lu\n", strlen(p[0]));
  //printf("6::%lu\n", strlen(&p));//?
  //printf("$::%lu\n", strlen(&p+1));//?
  //printf("5::%lu\n", strlen(&p[0]+1));


  //二维数组
  int a[3][4] = {0};
  printf("48::%lu\n",sizeof(a));
  printf("4::%lu\n",sizeof(a[0][0]));
  printf("16::%lu\n",sizeof(a[0]));
  printf("8::%lu\n",sizeof(a[0]+1));
  printf("8::%lu\n",sizeof(a+1));
  printf("8::%lu\n",sizeof(&a[0]+1));
  printf("16::%lu\n",sizeof(*a));
  printf("16::%lu\n",sizeof(a[3]));

}