怎么用函数求1到100被3整除的和及个数

Question

#include<stdio.h>
...
...

Answer 1

如下：

#include <stdio.h>

void fun(int *sum,int *cnt)
{
    int i = 0;
    *sum = 0;
    *cnt = 0;
    for(i=1;i<=100;i++)
    {
        if(i%3==0)
        {
            *sum = *sum + i;
            *cnt = *cnt + 1;
        }
    }
}

int main()
{
    int sum=0,cnt=0;
    fun(&sum,&cnt);
    printf("sum=%d,count=%d",sum,cnt);
    return 0;
}