Classify Numbers I/O Program

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