# include <stdio.h>
int main (void)
{
   int i;
   int sum = 0;  //所有奇数的和
   int num = 0;  //所有奇数的数量
   int avg;  //avg表示平均值
   
   for(i = 0; i <= 100; ++i)
   {
       if(i%2 == 1)
       {
          sum = + i;
          num = + 1;
       }
   }

   avg = sum / num;
   printf("avg = %d\n",avg);  //一直提示这一行出错了
   return 0;
}