P12—sizeof

P12—sizeof

#include <stdio.h>

int main()
{
    double *p = NULL;
    double a[100];

    printf("%d ",sizeof(p)); //4
    printf("%d ",sizeof(*p)); //8
    printf("%d ",sizeof(&p)); //4

    printf("%d ",sizeof(a)); //800
    printf("%d ",sizeof(&a)); //4
    printf("%d ",sizeof(*a)); //8
    printf("%d ",sizeof(a[100])); //8
    printf("%d ",sizeof(a[2250])); //8
}