Question

Write a program that would ask the user to enter an input file name, and an output file name. Then the program reads the content of the input file, and read the data in each line as a number (double). These numbers represent the temperatures degrees in Fahrenheit for each day. The program should convert the temperature degrees to Celsius and then writes the numbers to the output file, with the number of day added to the beginning of the temperature record.

NOTE: T(°C) = (T(°F) - 32) / 1.8 The converted temperature should be written with two decimal places

Answer 1

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

using namespace std;

int main() {
   string infilename, outfilename;
   cout << "Enter input file name: ";
   cin >> infilename;
   cout << "Enter output file name: ";
   cin >> outfilename;
   ifstream in(infilename.c_str());
   if(in.is_open()) {
      int count = 1;
      double fah, c;
      ofstream out(outfilename.c_str());
      while(in >> fah) {
         c = (fah - 32) / 1.8;
         out << count << "\t" << c << endl;
         count++;
      }
      out.close();
      in.close();
   }
   return 0;
}

nter input file name: input.txt Enter output file name: output.txt Process exited after 3.674 seconds with returnvalue 0 Press any key to continue - - -