一

#include "stdio.h"

int main()

{

 FILE *fp;

 int ninzu=0;

 char name[100];

 double hsum=0.0;

 double wsum=0.0;

 double height;

 double weight;

 if((fp=fopen("C:\\Users\\USER\\Desktop\\abc.txt","r")==NULL))

  printf("\a文件打开失败 \n");

  else{

   

   while(fscanf(fp,"%s%lf%lf",name,&height,&weight)==3){

   printf("%10s %5.1f %5.1f\n",name,height,weight);

   ninzu++;

   hsum +=height;

   wsum +=weight;   

   }

 printf("--------------------\n");

 printf("平均 %5.1f %5.1f",hsum/ninzu,wsum/ninzu);

 fclose(fp);

  }

  return 0;

}

二

#include "stdio.h"

int main()

{

 

 int ch;

 FILE *fp;

 char fname[64];

 printf("文件名：");

 scanf("%s",fname);

  if((fp=fopen(fname,"r"))==NULL)

 printf("文件打开失败");

 else{

  while((ch=fgetwc(fp))!=EOF )

  putchar(ch);

  fclose(fp);

 }

 

 

    return 0;

}