c语言中for循环计算多个整数的和及平均值

1、

#include <stdio.h>

int main(void)
{
    int num, counts, temp;
    int sum =0;
    
    puts("please input an num.");
    printf("num = "); scanf("%d", &num);
    
    for (counts = 1; counts <= num; counts++ )
    {
        printf("NO.%d = ", counts);
        scanf("%d", &temp);
        sum += temp;
    }
    
    printf("sum = %d\n", sum);
    printf("mean = %f\n", (double)sum / num);
    return 0;
}

↓

#include <stdio.h>

int main(void)
{
    int num, temp, counts, sum = 0;
    
    puts("please input an integer.");
    printf("num = "); scanf("%d", &num);
    
    for (counts = 0; counts < num; counts++)
    {
        printf("NO.%d = ", counts + 1);
        scanf("%d", &temp);
        sum += temp;
    }
    
    printf("sum = %d\n", sum);
    printf("mean = %f\n", (double)sum / num);
    return 0;
 }