/*
    ptrLab.cpp
    Name: 
    CIS 150
    Date: 
    
    CIS 150 Pointer Lab
*/

/*
    Place your name and section at the top in comments.
    Read the instructions for each section and then implement
    your solution within this program.
*/

#include <iostream>
#include <fstream>
#include <cstdlib>
#include <ctime>
using namespace std;

// 1. Create prototypes for the four functions described at the end of this lab.
void checkFile(const char* fname);

int main(int argc, char** argv) {
    const int SIZE = 25;
    int sum;
    
    // 2. Dynamically create an array of ints with SIZE elements named: array
    // 3. Call fillArray to fill the array with random ints from 1 - 100
    // 4. Call displayArray to print the elements of array on the screen.
    // 5. Call sumArray to get the sum of the elements of the array and store that value in sum.
    cout << "The sum of the array is " << sum << '\n';
    // 6. Open a file for sequential text output. The file name is nums.txt
    // 7. Call writeArray to store the elements in that file.
    // 8. Close that file.
    // 9. Release the memory you allocated for the array.

    checkFile("nums.txt");
    return 0;
}

void checkFile(const char* filename) {
    int numRecs = 0;
    int sum = 0;
    int num;
    ifstream infile(filename);
    
    if (!infile) {
        cout << "Error reading file" << endl;
    } else {
        infile >> num;
        while (!infile.eof()) {
            sum += num;
            numRecs++;
            infile >> num;
        }
    }
    infile.close();
    
    cout << "Records in file: " << numRecs << endl;
    cout << "Sum of records in file: " << sum << endl;
}

// Create the following functions:
// 1. fillArray
//    input: a pointer to an int array and an int length of the array
//    output: nothing
//    effect: fills the array with random ints between 1 and 100
//
// 2. displayArray
//    input: a pointer to an int array and an int length of the array
//    output: nothing
//    effect: displays the elements of the array on stdout with a space separator
//        with a newline after all the elements are printed
//
// 3. writeArray
//    input: a reference to an ofstream object, a pointer to an int array,
//           and an int length of the array
//    output: nothing
//    effect: writes the elements of the array to the specified file with a
//            newline after each element
//
// 4. sumArray
//    input: a pointer to an int array and an int length of the array
//    output: returns the sum of the integers in the array
//