数组和指针的区别

//这里说明了指针和数组的不同
//ar本身并不是一个数组，它是一个指向marbles首元素的指针 
#include<stdio.h>
#include<stdlib.h>
#define SIZE 10
int sum(int ar[],int n);
int main() {
    int marbles[SIZE]={20,10,5,39,4,16,19,26,31,20};
    long answer;
    answer=sum(marbles,SIZE);
    printf("The total number of marbles is %ld.\n",answer);
    printf("The size of is %d bytes.\n",sizeof marbles);
    system("pause");
    return 0;
}

int sum(int ar[],int n){
    int i;
    int total=0;
    
    for(i=0;i<n;i++)
        total+=ar[i];
    printf("The size of ar is %d bytes.\n",sizeof ar);
    return total;
}