c语言获取数组长度

//

//  array1.c

//  CDEMO

//

//  Created on 2016/8/27.

//  Copyright © 2016年. All rights reserved.

//

#include "array1.h"

#define GET_ARRAY_LENGTH(array,len){len = (sizeof(array) / sizeof(array[0]));}

void arrayDemo(void){

    int grade[10];

    unsignedint count =10;

    long sum =0L;

    float average =0.0f;

    

    printf("\n enter the 10 grade:\n");

    

    unsigned int i;

    for(i=0;i<count;i++){

        printf("%2u>",i+1);

        scanf("%d",&grade[i]);

        sum+=grade[i];

    }

    printf("now the i is :%u\n",i);

    GET_ARRAY_LENGTH(grade, count)

    

    for(i=0;i<count;i++){

        printf("%p\n",&grade[i]);

    }

    

    average = (float)sum/count;

    printf("average of ten grades enters is:%.2f",average);

}