C++ That Is Plaguing Me To This Day - c++

Question

What is the correct solution?
What is the correct solution?
What is the correct solution?
My Code (which is obviously wrong):
<iostream> and <fstream> libraries are included.
int main() {
int num = 0;
int totalCount = 0;
std::ifstream inFile;
double average = 0.0;
int totalTwo = 0;
double total = 0.0;
const double VALUE_ONE = 858.5;
std::cout << "What is the number? ";
std::cin >> num;
std::cout << std::endl;
inFile.open("numbers.txt");
while (inFile >> num) {
totalCount += num;
}
total = num * VALUE_ONE;
average = total/totalCount;
totalTwo = total * num;
inFile.close();
return 0;
}
numbers.txt

Answer 1

When you do this:
std::cin >> num;
std::cout << std::endl;
inFile.open("numbers.txt");
while (inFile >> num) {
totalCount += num;
}
you're reading into num and then immediately overwriting it with data from the input file. Use two variables for the two inputs.

Answer 2

Your code doesn't really match what the instructions say to do.
You are reading the user's chosen multiplier into num, and then you are reading the numbers from the text file into num as well, losing the multiplier. And you are not keeping track of how many numbers are read from the file, which you need in order to calculate the average.
You need to add a few more variables to your code to separate things. Also, there is no need for your VALUE_ONE constant at all.
Try something more like this:
#include <iostream>
#include <fstream>
int main()
{
int multiplier = 0;
int total = 0, totalTwo = 0;
int quantity = 0;
int num = 0;
double average = 0.0;
std::cout << "After all numbers are read, what number would you like to multiply the total by? ";
std::cin >> multiplier;
std::cout << std::endl;
std::ifstream inFile("numbers.txt");
while (inFile >> num) {
total += num;
++quantity;
}
inFile.close();
average = double(total) / quantity;
totalTwo = total * multiplier;
std::cout << "Total = " << total << "\n" << "Average = " << average << "\n" << "Total * " << multiplier << " = " << totalTwo;
return 0;
}
Live Demo