Question
Write a program that gives and takes advice on program writing. The program starts by writing a piece of advice to the screen and asking the user to type in a different piece of advice. The program then ends. The next person to run the program receives the advice given by the person who last ran the program. The advice is kept in a file, and the contents of the file change after each run of the program. You can use your editor to enter the initial piece of advice in the file so that the first person who runs the program receives some advice. Allow the user to type in advice of any length so that it can be any number of lines long. The user is told to end his or her advice by pressing the Return key two times. Your program can then test to see that it has reached the end of the input by checking to see when it reads two consecutive occurrences of the character '\n'...
Answer
PROGRAM CODE:
//Header section
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
const string adviceFileName = "advice.txt";
// Function to write advice to the file
void writeAdviceToFile(const string& advice) {
ofstream outputFile(adviceFileName, ios::app); // Open the file in append mode
if (outputFile.is_open()) {
outputFile << advice << "\n\n"; // Write the advice to the file with two newlines separating each advice
outputFile.close(); // Close the file
} else {
cerr << "Error opening the file for writing.\n";
}
}
// Function to read the last advice from the file
string readLastAdviceFromFile() {
ifstream inputFile(adviceFileName);
if (inputFile.is_open()) {
string advice;
string currentLine;
while (getline(inputFile, currentLine)) {
if (!currentLine.empty()) {
advice = currentLine; // Update the advice variable with each non-empty line
}
}
inputFile.close(); // Close the file
return advice;
} else {
cerr << "Error opening the file for reading.\n";
return "";
}
}
int main() {
string advice;
// Read the last advice from the file
string lastAdvice = readLastAdviceFromFile();
cout << "Previous advice: " << lastAdvice << endl;
// Get new advice from the user
cout << "Enter your advice (press Enter twice to finish):\n";
getline(cin, advice, '\n');
// Write the new advice to the file
writeAdviceToFile(advice);
return 0;
}
Data in "advice.txt":
Previous advice: Always use meaningful variable names and comments to improve code readability.
Enter your advice (press Enter twice to finish):
Avoid global variables as much as possible. They can lead to hidden dependencies and make code harder to understand.
OUTPUT OF THE PROGRAM CODE:
Previous advice: Avoid global variables as much as possible. They can lead to hidden dependencies and make code harder to understand.
Enter your advice (press Enter twice to finish):
hello marting hello