Reading numbers in from file

[TommehTGOD]

Hey in my C++ code, here is my input file

30713 4 3 3 4 3 3 2 3 4 3  
21356 4 4 4 3 3 3 2 3 2 3  
21265 4 1.5 3 3 3 0.5 2 3 3 3  
19364 4 3 3 3 -1   
19335 0 3 0 4 2 3 3 1.5 -1    
18264 2 3 3 0.5 3 0.5 3 3 2 3  
20135 4 1 3 4 3 1.5 0 3 -1  
22185 4 3 4 4 4 3 3 3 4 3 

The first number in each line represents the ID number, and the rest of numbers are varying (grade and credit hour)

How would I read the ID number in by itself and then read the grade and credit hour one set a time?
My teacher recommended that we have another loop in the while loop to read the grade and credit hours.

something like this

while (!infile.eof())
{
OutputFile<<ID<<setw(15)<<"Coming Soon"<<endl;
}

[Cubbi]

"while (!infile.eof())" is an error, but the idea is sound: have a loop that reads the file line by line, and another loop inside that reads the individual numbers from the line. For example,

#include <iostream>
#include <fstream>
#include <sstream>
#include <string>

using namespace std;
int main()
{
    std::ifstream f("test.txt");
    std::string line;
    while(getline(f, line))
    {
        std::istringstream linebuf(line);
        int id;
        linebuf >> id;
        std::cout << "ID = " << id;
        double grade, hours;
        while(linebuf >> grade >> hours)
        {
             std::cout << " g = " << grade << " h = " << hours;
        }
        std::cout << '\n';
    }
}

[Duthomhas]

This is what a stringstream is for. Also, don't loop on EOF.

#include <iostream>
#include <sstream>
#include <string>
#include <vector> 

struct student_credits_t
{
  unsigned     ID;
  vector <int> credit_hours;
};

vector <student_credits_t> all_student_credits;

student_credits_t credits;
while (infile >> credits.ID)
{
  string s;
  getline( infile, s );

  credits.credit_hours.clear();
  int credit;
  istringstream ss( s );
  while (ss >> credit)
  {
    credits.credit_hours.push_back( credit );
  }

  all_student_credits.push_back( credits );
}

It might be worth your time to put some of that stuff in a function.

Hope this helps.