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Creating and writing to file

closed account (9hUqko23)
I need to output all of the data I get to a text file. How would I go about doing this? I've read and re-read the chapter in my old C++ book but I can't figure it out. Could some give me an example using parts of my code?
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#include "stdafx.h" //trying to output data somewhere
#include <iostream>
#include <iomanip>
#include <cmath>
#include <fstream>

using namespace std;

int main(void)
{
	ofstream outputFile; //trying to output this data somewhere.
	outputFile.open("program3data.txt")

	if a, b, bb, c, d, e;
	char A, C;
	cout << "Input an alarm priority" << endl;
	cin >> a;
	if (a == 1)
	{
		cout << "Input a number to determine which equipment type you move to. " << endl;
		cout << "1 = PCB's 2 = Reg's 3 = xfmr's 4 = everything else" << endl;
		cin >> e;
		if (e == 1)
		{
			//code to output all of the analog telmetries assigned priority of one
			cout << "Input PCB prefix" << endl;
			cin >> A;
			cout << "Input MEAG Equipment number" << endl;
			cin >> bb;
			//since all of the alarm telemetries are the same -or should be- I can output the telemetries as the same for each
			//equipment number.
			cout << "PCB" << " " << "#" << A << "-" << bb << " " << "PHASE" << " " << "A(3)" << " " << "VOLTS" << endl;
			cout << "PCB" << " " << "#" << A << "-" << bb << " " << "PHASE" << " " << "B(2)" << " " << "VOLTS" << endl;
			cout << "PCB" << " " << "#" << A << "-" << bb << " " << "PHASE" << " " << "C(1)" << " " << "VOLTS" << endl;
			cout << "PCB" << " " << "#" << A << "-" << bb << " " << "NEUTRAL AMPS" << endl;
			cout << "PCB" << " " << "#" << A << "-" << bb << " " << "PHASE" << " " << "A(3)" << " " << "AMPS" << endl;
			cout << "PCB" << " " << "#" << A << "-" << bb << " " << "PHASE" << " " << "B(2)" << " " << "AMPS" << endl;
			cout << "PCB" << " " << "#" << A << "-" << bb << " " << "PHASE" << " " << "C(1)" << " " << "AMPS" << endl;
		}
	else if (e == 2)
		{
			cout << "Enter a Regulator equiment prefix" << endl;
			cin >> C;
			cout << "Enter a Regulator equipment number" << endl;
			cin >> d;
			cout << "REGULATOR" << " " << "#" << C << "-" << d << " " << "PHASE" << " " << "A(3)" << " " << "VOLTS" << endl;
			cout << "REGULATOR" << " " << "#" << C << "-" << d << " " << "PHASE" << " " << "B(2)" << " " << "VOLTS" << endl;
			cout << "REGULATOR" << " " << "#" << C << "-" << d << " " << "PHASE" << " " << "C(1)" << " " << "VOLTS" << endl;
			cout << "REGULATOR" << " " << "#" << C << "-" << d << " " << "PHASE" << " " << "A(3)" << " " << "AMPS" << endl;
			cout << "REGULATOR" << " " << "#" << C << "-" << d << " " << "PHASE" << " " << "B(2)" << " " << "AMPS" << endl;
			cout << "REGULATOR" << " " << "#" << C << "-" << d << " " << "PHASE" << " " << "C(1)" << " " << "AMPS" << endl;
		}
		//use a for loop to output all of the equipment numbers for the tranformers since the nunmber will either be A, B,
		//C, D, E, F, G, H, or I.
		else if (e == 3)
		{
			for (int t = 0; t <= 20; t++)
			{
				cout << "XFMR" << " " << "A" << " " << "INST AMPS" << endl;
			}
			for (int s = 0; s <= 20; s++)
			{
				cout << "XFMR" << " " << "B" << " " << "INST VOLTS" << endl;
			}
			for (int r = 0; r <= 20; r++)
			{
				cout << "XFMR" << " " << "C" << " " << "UNDERFREQUENCY" << endl;
			}
		}
		else if (e == 4)
		{
			//All other priority one nemenclatures
		}
		else
		{
			cout << "there are no other alarm priority nomencaltures of one." << endl;
		}
		//code for the rest fo the alarm nomenclatures.
	}
	else if (a == 2)
	{
		cout << "code to out put all of the analog telemetries assigned priority of two." << endl;
	}
	else if (a == 3)
	{
		cout << "code to output all of the analog telemetries assigned priority of three." << endl;
	}
	else if (a == 4)
	{
		cout << "code to output all of the analog telemetries assigned priority of four." << endl;
	}
	else if (a == 0)
	{
		cout << "code to output all of the analog telemetries assigned priority of five." << endl;
	}
	else;
	{
		cout << "Not a recognized alarm priority" << endl;
	}
	outputFile.close(); //trying to out put this data somwhere
	cout << "Done!" << endl;

	return 0;
}
Last edited on
MatthewRock (481)
Well, all your program does is checking with some IFs, and some for loops. If you want to save to outputFile, you should use it first :) Right now you only open it and close. Idk what data you want to store, but here's an example of my code for saving some data to file:
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std::ofstream file;

file.open("path/filename");
if( file.is_open() )
{
     std::vector<int> vec(4, 15);//Vector with 4 ints of value 15.
     for(auto& it : vec)
     {
          file << it << std::endl; // Put every item from vec in separate line, in file.
     }
     file.flush();
     file.close();
}
else
{
//show error
}


Remember, that opening a file in this mode will clear(delete) its previous content.
Cheers!
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