帮我看看错在哪。输出结构体mystudent的平均成绩。

#include
#include
 struct STU{
   int num;
   char name[20],sex[2];
   int age,score;
   };
/**/ struct  STU    /**/ mystudent[]={
       {1111,"Zhangqiang","m",20,80},
       {2104,"Liminghong","w",18,82},
       {3121,"Wangxingda","m",21,78},
       {4118,"Liushaotao","m",20,90},
       {1456,"Wuminghong","w",35,86}
       };
void main()
{  int i;
/**/ int sum=0 ;   /**/
  for(i=0;i<5;i++)
      /**/ sum+=(mystudent[i].score);      /**/
   printf("\nThr average is:%.2f\n",sum/5);
   getch();
  }

sum/5改成sum/5.0