Getline来自一个文件和另一个未知问题

当我按原样运行代码时，我的输出是：

This program will calculate the average of 10 test scores that you input
Number0

我的光标就在0之后，当我按下回车键时，它只会再次显示最后一行。我知道我需要更改说明。我也知道我需要使用getline命令让它显示带有空格的字符串，但我不知道如何在从文件中获取输入时做到这一点。此外，更重要的是，它不会从文件中获取考试成绩，也不会运行到文件末尾。

代码：

/***************************************************/
/* Author:     Sam LaManna                         */
/* Course:     CSC 135 Lisa Frye                   */
/* Assignment: Program 4 Grade Average             */
/* Due Date:   10/10/11                            */
/* Filename:   program4.cpp                        */
/* Purpose:    Write a program that will process   */
/*             students are their grades. It will  */
/*             also read in 10 test scores and     */
/*             compute their average               */
/***************************************************/
#include <iostream>     //Basic input/output
#include <iomanip>      //Manipulators
#include <string>       //String stuff 
#include <fstream>
using namespace std;
void instruct ();       //Function declaration for printing instructionstring studname ();
void input (ifstream &infile, float& test1, float& test2, float& test3, float& test4, float& test5, float& test6, float& test7, float& test8, float& test9, float& test10, string& studentname);      //Function declaration for input
float aver (float test1, float test2, float test3, float test4, float test5, float test6, float test7, float test8, float test9, float test10);      //Function declaration for calculating average
void output (string studentname, float average);      //Function declaration for output

int main()
{
  float test1 = 0;              //Vars (test1 - test10) for test scores
  float test2 = 0;
  float test3 = 0;
  float test4 = 0;
  float test5 = 0;
  float test6 = 0;
  float test7 = 0;
  float test8 = 0;
  float test9 = 0;
  float test10 = 0;
  string studentname = "a";     //Define Var for storing students name
  float average = 0;            //Define var for storing average

  instruct();     //Function call to print instructions

  ifstream infile("grades.dat");
  input (infile, test1, test2, test3, test4, test5, test6, test7, test8, test9, test10, studentname);     //Function call for scores
  while (!infile.eof())
    {
      average = aver (test1, test2, test3, test4, test5, test6, test7, test8, test9, test10);    //Function call for average
      output (studentname, average);     //Function call for output
      cin.ignore(1);
      input (infile, test1, test2, test3, test4, test5, test6, test7, test8, test9, test10, studentname); //Get new input
    }     //end eof
  return 0;
}
/***************************************************/
/* Name: instruct                                  */
/* Description: Print instructions to user.        */
/* Paramerters: N/A                                */
/* Return Value: N/A                               */
/***************************************************/
void instruct()
{
  cout << "n" << "This program will calculate the average of 10 test scores that you input. " << "n" << "n";
  //Prints instructions
  return;
}
/***************************************************/
/* Name: input                                     */
/* Description: Get input                          */
/* Paramerters: N/A                                */
/* Return Value: N/A                               */
/***************************************************/
void input (ifstream& infile, float& test1, float& test2, float& test3, float& test4, float& test5, float& test6, float& test7, float& test8, float& test9, float& test10, string& studentname)
{
  infile >> studentname;
  infile >> test1 >> test2 >> test3 >> test4 >> test5 >> test6 >> test7 >> test8 >> test9 >> test10;
  infile.ignore(10, 'n');
  return;
}

/***************************************************/
/* Name: aver                                      */
/* Description: Calculate Average                  */
/* Paramerters: N/A                                */
/* Return Value: aver                              */
/***************************************************/

float aver (float test1, float test2, float test3, float test4, float test5, float test6, float test7, float test8, float test9, float test10)
{
  float aver = 0;
  aver = test1 + test2 + test3 + test4 + test5 + test6 + test7 + test8 + test9 + test10;
  aver = aver / 10;
  return aver;
}

/***************************************************/
/* Name: output                                    */
/* Description: Calculate Average                  */
/* Paramerters: N/A                                */
/* Return Value: aver                              */
/***************************************************/
void output (string studentname, float average)      //Function declaration for output
{ 
  cout << studentname;
  cout << average;
  return;
}

输入文件：

Number One
99 99 99 99 99 99 99 99 99 99
John Doe
90 99 98 89 87 90.2 87 99 89.3 91
Clark Bar
67 77 65 65.5 66 72 78 62 61 66
Scooby Doo
78 80 77 78 73 74 75 75 76.2 69
Santa Clause
89 92.5 94 95 91 89 88 90 92 91
Jessie James
45 54 55 56 66 61 65.6 67 43 54
Clara Barton
87 88 76 75.7 80 88 83 84 85 81.2
Alex Mack
55 65 66.5 67 76 77.7 66 67.8 71 70
Ann Apolis
87 88 88 88 88 85.4 81 82 89 81
Stewart Mouse
90 92 93 94 95 96 97 97.7 98 99
Sue Sloan
88.5 67.7 88.8 99.9 90.9 89 87 78 89 88
Luke Skywalker
76.7 77.8 88.8 76.7 77 88 87 86 85 80.9
Harry Potter
80 83 84 85 86 79.4 78.5 81 80 82
Mary Poppins
100 100 100 100 100 100 100 100 100 100
Last One
33 44 55 66 77 88 99 22 11 91