Input File Data Into Array in C++?

[wizardman]

Hello,
Below is some code I've been working with. The first part saves my test_data array out to a text file. That works fine. The question is how do I retrieve that data back into another array so I can use the that data somewhere else? The includes you'll see first are what I have at the top of my code at this point. The #include "fstream.h" is not commented out for my outputsto work. I'm not sure what I need to make this work. Can someone help me out? If you need any more info please let me know. Thanks in advance.

#include "fstream.h"
//#include "iostream.h"

//********** OUTPUT DATALOG RESULTS *******************

short i;
float test_data[4];
test_data[0] = 1.23;
test_data[1] = 2.34;
test_data[2] = 3.45;
test_data[3] = 4.56;

//**** OUTPUT TEST_DATA ****
ofstream outfile1("C:\\test.txt",ios::out);
for(i=0;i<4;i++)
{
        outfile1 <<test_data[i];
        outfile1<<endl;
}
outfile1.close();


// NEXT I WANT TO TAKE THE DATA SAVED INTO THE TEST.TXT FILE
// AND INSERT IT INTO THE SAMPLE ARRAY
// THIS IS WHERE I NEED SOME HELP IF POSSIBLE,
// BESIDES THE VARIABLE ARRAY "SAMPLE[4]"
// THE CODE BELOW THAT FLOAT IS WHAT I DON'T THINK WILL WORK.

float sample[4];  // SO WHAT DO I DO NOW?

//**** INPUT TEST_DATA TO SAMPLE ****
ifstream infile1("C:\\test.txt",ios::in);
for(i=0;i<4;i++)
{
        infile1 <<test_data[i];
        infile1<<endl;
}
infile1.close();

[Valmont]

#include <iostream>
#include <fstream>

//--
using std::cin;
using std::ifstream;
using std::ofstream;
using std::cout;
using std::endl;
//--

int main()
{
  float test_data[4];
  test_data[0] = 1.23;
  test_data[1] = 2.34;
  test_data[2] = 3.45;
  test_data[3] = 4.56;

  //**** OUTPUT TEST_DATA ****
  ofstream outfile("test.txt", std::ios::out);
  for(short i=0; i<4; i++)
  {
    outfile <<  test_data[i] << "  ";
    outfile << endl;
  }
  outfile.close();


  //**** INPUT TEST_DATA TO SAMPLE ****

  float sample[4] = {0};  //Always good to intialize arrays.
  short i(0);
  ifstream infile("test.txt", std::ios::in);
  while(infile >> sample[i])
  {
    ++i;
  }
  infile.close();
  
  //Test
  for(short i=0; i < 4; ++i)
  {
    cout<<sample[i]<<endl;
  }

  return 0;
}

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