File I/O

[kateryna]

Hi!
I need to write a program that reads information about youth soccer teams from a file, calculates the average score for
each team and prints the averages in a neatly formatted table along with the team name.
My problem is these input and output files. I know I have to use <fstream> and

infile.open
outfile.open

infile.close
outfile.close

When using these, does the ".txt" file have to print out in my output? How does it work?

[ilikepython]

Hi!
I need to write a program that reads information about youth soccer teams from a file, calculates the average score for
each team and prints the averages in a neatly formatted table along with the team name.
My problem is these input and output files. I know I have to use <fstream> and

infile.open
outfile.open

infile.close
outfile.close

When using these, does the ".txt" file have to print out in my output? How does it work?

I dont really know what you are talking about. If your text file's name is "file.txt":

infile.open("file.txt");
 

[kateryna]

I dont really know what you are talking about. If your text file's name is "file.txt":

infile.open("file.txt");
 

I am supposed to create a file ( ex: "input.txt ) in my project directory and the program has to read the data from that file. This is what I tried and it does not work.

#include <fstream>
#include <iostream>
 
 
using namespace std;
 
int main()
 
{
       ofstream myOutfile;
       myOutfile.open("input.txt");
       if(!myOutfile)
 
 
    {
 
        cout << "File did not open";
            exit(1);
 
 
    }
 
    int input = 10;
    myOutfile << input;
 
    myOutfile.close();
 
 
    cin.get();
    cin.get();
 
 
 
 
}

[ilikepython]

I am supposed to create a file ( ex: "input.txt ) in my project directory and the program has to read the data from that file. This is what I tried and it does not work.
#include <fstream>
#include <iostream>


using namespace std;

int main()

{
ofstream myOutfile;
myOutfile.open("input.txt");
if(!myOutfile)


{

cout << "File did not open";
exit(1);


}

int input = 10;
myOutfile << input;

myOutfile.close();


cin.get();
cin.get();




}

Try using:

if (myOutfile.is_open())
{
}
 

Also, make sure the file is in the same directory as the program otherwise you have to use an absolute path.

[Ganon11]

But since he's using an ofstream, if the text file doesn't exist, shouldn't it create one for him named input.txt?

[weaknessforcats]

I'm confused here:

[quote=kateryna]
I am supposed to create a file ( ex: "input.txt ) in my project directory and the program has to read the data from that file. This is what I tried and it does not work.
[//quote]

If the program has to read from the file, why is it opened as an output file?

Isn't this a case where you create input.txt with an editor and then read it as an ifstrream???