c语言while循环控制循环次数

1、

#include <stdio.h>

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

 ↓

#include <stdio.h>

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