I am at wit's end on how to incorporate File I/O into my C++ program. After learning on Udemy I am trying to find the best way to use functions having the main at the bottom. I understand # include is needed for both I?O, I just am clueless with this program how to incorporate it in this simple program. Can I get help understanding File I/O for C++ so that I can add to this project? #include #include using namespace std; string mixColors(int color1, int color2) { string mixedColor; if ((color1 == 0 && color2 == 1) || (color1 == 1 && color2 == 0)) { mixedColor = "purple"; } else if ((color1 == 0 && color2 == 2) || (color1 == 2 && color2 == 0)) { mixedColor = "orange"; } else if ((color1 == 1 && color2 == 2) || (color1 == 2 && color2 == 1)) { mixedColor = "green"; } else { mixedColor = "No Mix"; } return mixedColor; } int getUserInput() { int color; cout << "Enter a prime color: " << endl; cout << "'0' for red, '1' for blue, and '2' for yellow: "; cin >> color; return color; } int main() { string arr[] = {"red", "blue", "yellow"}; int color1, color2; string mixedColor; char choice; do { color1 = getUserInput(); color2 = getUserInput(); mixedColor = mixColors(color1, color2); cout << "Mixed color for your selection (" << color1 << " and " << color2 << ") is " << mixedColor << endl; cout << "Would you like to mix again? (Y/N): "; cin >> choice; } while (toupper(choice) == 'Y'); cout << "Goodbye!" << endl; return 0; }

Name: I am at wit's end on how to incorporate File I/O into my C++ program.
Uploaded: 2024-03-20T06:51:23.000Z
Channel: Bartleby
Description: I am at wit's end on how to incorporate File I/O into my C++ program. After learning on Udemy I am trying to find the best way to use functions having the main at the bottom.I understand # include is needed for both I?O, I just am clueless

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Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

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I am at wit's end on how to incorporate File I/O into my C++ program. After learning on Udemy I am trying to find the best way to use functions having the main at the bottom.

I understand # include <fstream> is needed for both I?O, I just am clueless with this program how to incorporate it in this simple program.

Can I get help understanding File I/O for C++ so that I can add to this project?

#include <iostream>

#include <string>

using namespace std;

string mixColors(int color1, int color2) {

string mixedColor;

if ((color1 == 0 && color2 == 1) || (color1 == 1 && color2 == 0)) {

mixedColor = "purple";

} else if ((color1 == 0 && color2 == 2) || (color1 == 2 && color2 == 0)) {

mixedColor = "orange";

} else if ((color1 == 1 && color2 == 2) || (color1 == 2 && color2 == 1)) {

mixedColor = "green";

} else {

mixedColor = "No Mix";

}

return mixedColor;

}

int getUserInput() {

int color;

cout << "Enter a prime color: " << endl;

cout << "'0' for red, '1' for blue, and '2' for yellow: ";

cin >> color;

return color;

}

int main() {

string arr[] = {"red", "blue", "yellow"};

int color1, color2;

string mixedColor;

char choice;

do {

color1 = getUserInput();

color2 = getUserInput();

mixedColor = mixColors(color1, color2);

cout << "Mixed color for your selection (" << color1 << " and " << color2 << ") is " << mixedColor << endl;

cout << "Would you like to mix again? (Y/N): ";

cin >> choice;

} while (toupper(choice) == 'Y');

cout << "Goodbye!" << endl;

return 0;

}

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I have this code now.

#include <iostream>

#include <string>

#include <fstream>

using namespace std;

string mixColors(int color1, int color2) {

string mixedColor;

if ((color1 == 0 && color2 == 1) || (color1 == 1 && color2 == 0)) {

mixedColor = "purple";

} else if ((color1 == 0 && color2 == 2) || (color1 == 2 && color2 == 0)) {

mixedColor = "orange";

} else if ((color1 == 1 && color2 == 2) || (color1 == 2 && color2 == 1)) {

mixedColor = "green";

} else {

mixedColor = "No Mix";

}

return mixedColor;

}

//reads colors from a file

int getUserInput(ifstream& inFile) {

int color;

inFile >> color;

return color;

}

void writeOutputToFile(ofstream& outFile, int color1, int color2, const string & mixedColor){

outFile << "Mixed color selected (" << color1 << " and " << color2 << ") is " << mixedColor << endl;

}

//writes mixed color results to a file

int main() {

ifstream inputFile("input.txt"); //opens input file

ofstream outputFile("output.txt"); // opens output file

if (!inputFile || !outputFile) {

cerr << "Error opening files!" << endl;

return 1;

}

string arr[] = {"red", "blue", "yellow"};

int color1, color2;

string mixedColor;

char choice;

do {

color1 = getUserInput(inputFile);

color2 = getUserInput(inputFile);

mixedColor = mixColors(color1, color2);

writeOutputToFile(outputFile, color1, color2, mixedColor);

cout << "Mixed color for your selection (" << color1 << " and " << color2 << ") is " << mixedColor << endl;

cout << "Would you like to mix again? (Y/N): ";

cin >> choice;

} while (toupper(choice) == 'Y');

cout << "Goodbye!" << endl;

return 0;

}

I continue to see an error opening the files. I have a new file output.txt saved to my computer but there is no input file and the program is not running.

What am I doing wrong?

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