创建文件代码：
void main()
{
   int account;
   char name[ 30 ];
   double balance;
   
   FILE *cfPtr;
   
   if( ( cfPtr = fopen( "clients.dat", "w" ) ) == NULL ){
      printf( "File could not be opened\n" );   
   }
   else{
      printf( "Enter account, name and balance\n" );
      printf( "Enter EOF to end\n" );
      printf( "? " );
      scanf( "%d%s%lf", &account, name, &balance );   
   }
   
   while( !feof( stdin ) ){
      fprintf( cfPtr, "%d %s %.2f", account, name, balance );
      printf( "? " );
      scanf( "%d%s%lf", &account, name, &balance );   
   }
   
   fclose( cfPtr );
}

读文件代码：
#include "stdio.h"

void main()
{
   int account;
   char name[ 30 ];
   double balance;
   
   FILE *cfPtr;
   
   if( ( cfPtr = fopen( "clients.dat", "r" ) ) == NULL ){
      printf( "File could not be opened\n" );   
   }
   else{
      printf( "%-10s%-13s%s\n", "Account", "Name", "Balance" );
      fscanf( cfPtr, "%d%s%lf", &account, name, &balance );   
   }
   
   while( !feof( cfPtr ) ){
      printf( "%-10d%-13s%7.2f\n", account, name, balance );
      fscanf( cfPtr, "%d%s%lf", &account, name, &balance );   
   }
   
   fclose( cfPtr );
}
但是运行的时候为什么不停地读出文件中的第一条信息，后面的为什么没有，本人是初学者，还请各位前辈不吝赐教！！不胜感激！！！

看来这里没有高手呀，还是问题太简单了

我猜可能是因为写入的时候，balance和后面的account没有空格隔开，所以读取的时候就乱套了

明白了，少了一个换行
fprintf( cfPtr, "%d %s %.2f\n", account, name, balance );
兄弟一语惊醒梦中人，多谢了

加油！

#include <stdio.h>
int main()
{
    FILE    *fp;

    if( (fp=fopen("client.dat", "r"))==NULL )
    {
        printf(" Error1\n");
        exit( 0 );
    }
    whiel( !feof(fp) )
        printf("%c", fgetc(fp));
   
    fclose( fp );
    return 0;
}