#include <stdio.h>
#include <stdlib.h>
struct stu_Message
{
       long num;
       char name[100];
       float score[3];      
}stu[5];
int main(int argc, char *argv[])
{
  void print (struct stu_Message *p1);
  struct stu_Message *q =stu;
  int i;
  for (i = 0;i < 5; i++,q++)
  {
      printf ("请输入第%d个学生的信息\n",i + 1);
      scanf ("%ld,%s,%f,%f,%f",&q->num,q->name,&q->score[i],&q->score[i+1],&q->score[i+2]);
  }
  q =stu;
  print (q);
  system("PAUSE");   
  return 0;
}

/*打印*/
void print (struct stu_Message *r)
{
  int i;
    for (i = 0;i < 5; i++,++r)      
      printf ("第%d个学生的信息为:%ld,%s,%f,%f,%f\n",i + 1,r->num,r->name,r->score[i],r->score[i+1],r->score[i+2]);
}

为什么每个学生的成绩后面多 几个000000000

printf ("第%d个学生的信息为:%ld,%s,%.2f,%.2f,%.2f\n",i + 1,r->num,r->name,r->score[i],r->score[i+1],r->score[i+2]);  //这样可以只保留两位小数了