Question

1 Purpose
This is another program for reading from files. In this program we will read blocks of data from a (well-formatted) file that you will be given and make some computations on that data.
The input file will be formatted as described later in this document. It will be similar the “block” data from Lecture 10.
2 Procedure
You will create one source code program, Prog07.cpp. This program will
1. Prompt the user for an input filename. Store the filename as a string object. See Lectures 10 and 11. Then prompt the user for an output filename. Store it the same way.
2. Open the input filename for reading. Open the output filename for writing with append. If you cannot open either of the filenames the user supplied, prompt the user for two more. Repeat this until you can open the both user’s files. I found that if you want to use just the plain file name, the file should be placed the directory where Visual Studio puts the “.vcxproj” file and the “.cpp” file. Otherwise you have to give the FULL path to the file. If you put the file on the Desktop, the filename will be something like
C:\users\your_user_name\Desktop\your_real_file_name
3. Once the files are open, read in blocks of data until one of two things happens:
• You reach the end of the file. • The block you read in has an ID number of 0.
1
4. The data you are provided will be stored in files using a structure that is defined like this:
struct employee { int id; char department[25]; float hours; };
5. For each block of data (unless its ID number is 0) add the number of hours to compute a total hours.
6. Count the number of employees. Every block with an ID number greater than 0 is another employee. Do not worry about duplicates.
7. Once you are through reading, the program will write three lines of output to the output file (the last line is just blank) like
Filename.info: 76 employees Total hours: 192.8, Average per employee: 19.7278 hours.
That should be the actual filename you used NOT “Filename.info.” See the end of this document for some example runs of the program.
8. Make sure that you close both the files before exiting.
9. If you have done this correctly, you can reuse the output filename and see the output of all the tests in it.
10. Upload your solution to the WyoCourses site, Program 07 assignment.
11. Your solution should consist of exactly 3 files:
(a) A C++ source code file, Prog07.cpp which contains all of the code for the main program as well as the code for all the functions. (b) A text file, Prog07Test.txt which contains the results of the tests of your program using all four of the data files. Remember to test that if you supply incorrect input filenames, the program prompts again for new filenames. If you give it the “wrong” output filename, the program will just create a new file. (c) A text file, Prog07Output.txt which contains the actual program output of the the four tests. (d) I am not going to require a pseudocode file this time.
2
Program 07 Tests.
Example results from a completed version of “Prog07.cpp” using only the “data1.info” and “data2.info” files. Note that “type” is a command line command that ’dumps’ text files to the terminal. You could just open the output file in any text editor (I would not use notepad, but notepad++ works well).
buckner ~...prog07/solution> Prog07.exe
Please enter an input filename: data1.info Please enter an output filename: output.txt
buckner ~...prog07/solution> Prog07.exe
Please enter an input filename: data2.info Please enter an output filename: output.txt
buckner ~...prog07/solution> type output.txt
data1.info: 25 employees. total hours: 1221.92, Average per employee: 48.8769 hours.
data2.info: 15 employees. total hours: 907.893, Average per employee: 60.5262 hours.
buckner ~...prog07/solution>

what ive got so far....

// Prog07.cpp
// Nick Hill
// COSC1030 lab section 12
// program 07

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

using std::cin;
using std::cout;
using std::cerr;
using std::endl;
using std::ofstream;
using std::ifstream;
using std::string;
using std::getline;

struct employee
{
   int id;
   char department[25];
   float hours;
}emp;

int main()
{
   ofstream write;
   ifstream read;
   string inFile,
       outFile;
   bool open = 0;
   while (!open)
   {
       cout << "Enter an input filename: ";
       getline(cin, inFile);
       cout << "Enter an output filename: ";
       getline(cin, outFile);

       read.open(inFile);
       write.open(outFile, std::ofstream::app);
       if (read.is_open() && write.is_open())
       {
           open = 1;
       }
   }
   read.eof();
   if(!read.eof())
   {

   }

i cant figure out where to go from here

Answer 1

Since you have not provided input file structure I am assuming that all the data of one structure are in a continuous way. If it does not work please provide input file format.

#include<iostream>

#include<fstream>

#include<string>

using std::cin;

using std::cout;

using std::cerr;

using std::endl;

using std::ofstream;

using std::ifstream;

using std::string;

using std::getline;

int main()

{

   ofstream write;

   ifstream read;

   string inFile, outFile;

   bool open = 0;

   while (!open)

   {

       cout << "Enter an input filename: ";

       getline(cin, inFile);

       cout << "Enter an output filename: ";

       getline(cin, outFile);

       read.open(inFile);

       write.open(outFile, std::ofstream::app);

       if (read.is_open() && write.is_open())

       {

           open = 1;

       }

   }

   int id;

   char data[25];

   float hours;

   int count = 0;

   float total_hours = 0;

   while(read >> id && id != 0 && read >> data && read >> hours){

       count++;

       total_hours += hours;

   }

   float avg_hours = total_hours / count;

   //Getting just the file name

   string inputFileName = inFile.substr(inFile.rfind("\\") + 1);

   write << inputFileName << ": " << count << " employees. " << "Total hours: " << avg_hours << ", " << "Average per employee: " << avg_hours << " hours" << endl;

    read.close();

    write.close();

    return 0;

}