程序代码：

#include<stdio.h>

int average_num(int a[],int n)
{
  /**********Program**********/

 int i,sum=0,x=0;

 double aver;

 for(i=0;i<n;i++)

 sum=sum+a[i];

 aver=(double)sum/n;

 for(i=0;i<n;i++)

 if(a[i]<aver)

 x++;

 return x;
   /**********  End  **********/
}

main()
{
  int n,a[100],i,num;
  
  scanf("%d",&n);
  for(i=0;i<n;i++)
    scanf("%d",&a[i]);
  num=average_num(a,n);
  printf("the num is:%d\n",num);
  yzj();
  
}

yzj()
{
  FILE *IN,*OUT;
  int n;
  int i[10];
  int o;
  IN=fopen("in.dat","r");
  if(IN==NULL)
  {
    printf("Read File Error");
  }
  OUT=fopen("out.dat","w");
  if(OUT==NULL)
  {
    printf("Write File Error");
  }
  for(n=0;n<5;n++)
  {    
    fscanf(IN,"%d",&i[n]);
  }
  o=average_num(i,5);
  fprintf(OUT,"%d\n",o);
  fclose(IN);
  fclose(OUT);
}

[此贴子已经被作者于2015-12-25 20:33编辑过]