程序2-11 数据统计（fopen版）

#include<stdio.h>
#define INF 1000000000
int main()
{
FILE *fin,*fout;

fin=fopen("data.in","rb");
fout=fopen("data.out","wb");

int x,n=0,min=INF,max=-INF,s=0;
while(fscanf(fin,"%d",&x)==1)
{
s+=x;
if(x<min) min=x;
if(x>max) max=x;
n++;
}
fprintf(fout,"%d %d %.3f\n",min,max,(double)s/n);

fclose(fin);
fclose(fout);

return 0;
}