#include<stdio.h>
int even(int number);
int main(void)
{   
    int number,sum;
    sum=0;
    printf("输入要求和的奇数：");
    scanf("%d",&number);
    even(number);
    printf("求和结果是：%d",sum);
   
    return 0;
}

int even(int number)
{   
    int sum;
    sum=0;
    if(number>=0){
    while(number/2==0){
        sum=number+sum;
                      }
                   }
     else
     return 0;
     return sum;                                 
}

求大佬指点

#include<stdio.h>
int even(int number);
int main(void)
{   
    int number,sum;
    sum=0;
    printf("输入要求和的奇数：");
    scanf("%d",&number);
    sum = even(number);
    printf("求和结果是：%d",sum);
   
    return 0;
}

int even(int number)
{   
    int sum;
    sum=0;
    if(number>=0)
    {
        while(number%2 !=0)
        {
            sum=number+sum;
            number -= 2;
            if (number < 0)
                break;
        }
     }
     return sum;                                 
}

#include<stdio.h>
double fact(int n);
int main (void)
{
    int i;
    double sum;
    sum=0;
   
    for(i=1;i<=10;i++)
        sum=sum+fact(i);
      printf ("1!+2!+...+10!=%f\n",sum);
      
      return 0;  
}
double fact(int n)
{
     int i;
     double result;
     n=10;
     result=1;
     
     for(i=1;i<=n;i++)
     result=i*result;
     return result;                                                                                                                          
}

这个结果怎么错了

将%f 改成%lf 看看