指针与数组的区别

#include <stdio.h>
int main()
{
    double addr[10] = {12.23,13.412,1251.23,234.4,215.6,62.2,652.3,635.2,63.6,324.6};
    char *p_char;
    short *p_short;
    int *p_int;
    long *p_long;
    long long *p_long_long;
    float *p_float;
    double *p_double;
    
/*
    p_double = addr;    //指针可以更改指向。
    addr = p_double;    //数组是不可更改指向的。
    数组相当于 指针常量
*/   


    printf("sizeof(addr)        = %lu\n\n",sizeof(addr));//80   

    //指针在６４位机中所占字节数　都是　８字节，这就是指针为什么这么高效的原因。
    //指针与数组的区别：１．64位指针所占字节数永远，数组所占字节数是他的所有元素的字节数集合
    printf("sizeof(p_char)      = %lu\n",sizeof(p_char));
    printf("sizeof(p_short)     = %lu\n",sizeof(p_short));
    printf("sizeof(p_int)       = %lu\n",sizeof(p_int));
    printf("sizeof(p_long)      = %lu\n",sizeof(p_long));
    printf("sizeof(p_long_long) = %lu\n\n",sizeof(p_long_long));
    printf("sizeof(p_float)     = %lu\n",sizeof(p_float));
    printf("sizeof(p_double)    = %lu\n",sizeof(p_double));
    

    return 0;
}