c语言输入输出

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;
}

巴特西

c语言输入输出

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