使用fstream在c ++中读取文件时显示额外的字符串

Question

I have a program in c++ which is used to read some text from a .txt file using fstream functions. But on output screen, it is showing an extra output of while loop which is undesirable.So if tt.txt contains the data

ss 
123

then output is

Name ss
roll no 123

name
roll 123

Code:

#include<iostream.h>
#include<conio.h>
#include<fstream.h>
#include<string.h>
#include<stdio.h>
void student_read()
{
  clrscr();
  char name[30];
  int i,roll_no;
  ifstream fin("tt.txt",ios::in,ios::beg);
  if(!fin)
  {
    cout<<"cannot open for read ";
    return;
  }

  while(!fin.eof())
  {  
    fin>>name;
    cout<<endl;
    fin>>roll_no;
    cout<<endl;
    cout<<"Name is"<<"\t"<<name<<endl;
    cout<<"Roll No is"<<roll_no<<   endl;
  }
}

void main()
{
  clrscr();
  cout<<"Students details is"<<"\n";
  student_read();
  getch();
}

Answer 1

See the C++ FAQ for help with I/O: http://www.parashift.com/c++-faq/input-output.html

#include <iostream>
#include <fstream>

void student_read() {
  char name[30];
  int roll_no;

  std::ifstream fin("tt.txt");
  if (!fin) {
    std::cout << "cannot open for read ";
    return;
  }

  while(fin >> name >> roll_no) {
    std::cout << "Name is\t" << name << std::endl;
    std::cout << "Roll No is\t" << roll_no << std::endl;
  }
}

int main() {
  std::cout << "Students details is\n";
  student_read();
}