From 459b2be53f379fc5ca0a5c510a365831a89ca43c Mon Sep 17 00:00:00 2001
From: Ritika <ritikasarpal11@gmail.com>
Date: Wed, 8 Jan 2025 16:42:39 -0800
Subject: [PATCH] Classify Numbers I/O Program

Asks user for name of existing input file to read data from and name of output file. Output file created by program and program will not run if output file name already exists. Numbers in input file should be integers entered on seperate lines.
---
 ClassifyNumbers.cpp | 136 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 136 insertions(+)
 create mode 100644 ClassifyNumbers.cpp

diff --git a/ClassifyNumbers.cpp b/ClassifyNumbers.cpp
new file mode 100644
index 0000000..cf9de16
--- /dev/null
+++ b/ClassifyNumbers.cpp
@@ -0,0 +1,136 @@
+#include <iostream>
+
+#include <string>
+
+#include <iomanip>
+
+#include <fstream>
+
+#include <filesystem>
+
+using namespace std;
+
+
+//Function prototypes
+void initialize(int & zeroCount, int & oddCount, int & evenCount, int & counter, int & sum);
+
+void getNumber(int & line, ofstream & outputFile, int & counter);
+
+void classifyNumber(int num, int & zeroCount, int & oddCount, int & evenCount, int& sum);
+
+void printResults(int zeroCount, int oddCount, int evenCount, int sum, float average, ofstream& outputFile);
+
+int main() {
+  //Variable declaration
+  int counter; //loop control variable
+  int number; //variable to store the new number
+  int zeros; //variable to store the number of zeros
+  int odds; //variable to store the number of odd integers
+  int evens; //variable to store the number of even integers
+  int sum; //variable to store the sum of all numbers
+  float average; //variable to store average of all numbers
+  string inputFileName; //variable to store input file's name
+  string outputFileName; //variable to store output file's name
+
+  initialize(zeros, odds, evens, counter, sum); //Step 1
+
+  cout << "Please enter input file name: " << flush;
+
+  cin >> inputFileName;
+
+  ifstream inputFile(inputFileName);
+
+  if (!inputFile) {
+      cerr << "Error: Could not open file for reading" << endl;
+      return 1;
+  }
+
+  cout << "Please enter output file name: " << flush;
+
+  cin >> outputFileName;
+
+  cin.ignore();
+
+  if (filesystem::exists(outputFileName)) {
+      cerr << "Output file already exists" << endl;
+      inputFile.close();
+      return 1;
+  }
+
+  ofstream outputFile(outputFileName);
+
+  if (!outputFile) {
+      cerr << "Error: Could not open file for writing" << endl;
+      inputFile.close();
+      return 1;
+  }
+ 
+  string line;
+
+  while (getline(inputFile, line)) {
+    if (line.empty()) {
+        continue;
+    }
+    try {
+      number = stoi(line);
+    }
+    catch (const exception& e) {
+      cerr << e.what() << endl;
+      inputFile.close();
+      outputFile.close();
+      return 1;
+    }
+    getNumber(number, outputFile, counter);
+    classifyNumber(number, zeros, odds, evens, sum);
+  }
+
+  if (counter % 11 != 0) {
+      outputFile << endl;
+  }
+
+  average = sum/(1.0*(odds + evens));
+
+  printResults(zeros, odds, evens, sum, average, outputFile); //Step 4
+
+  inputFile.close();
+  outputFile.close();
+
+  return 0;
+}
+
+void initialize(int & zeroCount, int & oddCount, int & evenCount, int & counter, int & sum) {
+  zeroCount = 0;
+  oddCount = 0;
+  evenCount = 0;
+  counter = 1;
+  sum = 0;
+}
+
+void getNumber(int & line, ofstream & outputFile, int & counter) {
+    outputFile << line << " " << flush;
+    if (counter % 10 == 0) {
+        outputFile << endl;
+    }
+    counter ++;
+}
+
+void classifyNumber(int num, int & zeroCount, int & oddCount, int & evenCount, int& sum) {
+  sum += num;
+  switch (num % 2) {
+  case 0:
+    evenCount++;
+    if (num == 0)
+      zeroCount++;
+    break;
+  case 1:
+  case -1:
+    oddCount++;
+  } //end switch
+} //end classifyNumber
+
+void printResults(int zeroCount, int oddCount, int evenCount, int sum, float average, ofstream& outputFile) {
+  outputFile << "\nThere are " << evenCount << " evens, " << "which includes " << zeroCount << " zeros" << endl;
+  outputFile << "The number of odd numbers is: " << oddCount << endl;
+  outputFile << "The sum of the numbers is: " << sum << endl;
+  outputFile << "The average of the numbers is: " << average << endl;
+} //end printResults