Here is a simple program in C++ to read a file using ifstream.

read_fstream.cpp

/* 
Suppose the file has these values
inf1 inf2
*/

#include <iostream>
#include <fstream>
using namespace std;

int main () {
  ifstream infile("filename");

  string first, second;
  infile >> first >> second;
  
  return 0;
}