c语言中的对象式宏

1、

#include <stdio.h>

#define NUMBER 5

int main(void)
{
    int i;
    int sum = 0;
    int a[NUMBER];
    
    puts("please input the scores.");
    for (i = 0; i < NUMBER; i ++)
    {
        printf("NO.%d: ", i + 1);
        scanf("%d", &a[i]);
        sum += a[i];
    }
    
    printf("sum = %5d
", sum);
    printf("mean = %5.1f
", (double)sum / NUMBER);
    
    return 0;
}

 ↓

#include <stdio.h>

#define NUMBER 10

int main(void)
{
    int i;
    int sum = 0;
    int a[NUMBER];
    
    puts("please input the scores.");
    for (i = 0; i < NUMBER; i ++)
    {
        printf("NO.%d: ", i + 1);
        scanf("%d", &a[i]);
        sum += a[i];
    }
    
    printf("sum = %5d
", sum);
    printf("mean = %5.1f
", (double)sum / NUMBER);
    
    return 0;
}