Reading From a File

1. Include the fstream library.
2. Create an ifstream object.
3. Open the file with .open()
4. Read the file
   a. Use getline() to read line by line
   b. Use >> to read word by word
5. Close the file with .close()

Example:

#include <iostream>
#include <fstream>
using namespace std;
 
int main() {
    // Opens the file
    ifstream inFile;
    inFile.open("data.txt");
    // Varifies the file exists
    if (!inFile.is_open())
        return 0;
    // Iterates through every line in the file
    string line;
    while (getline(inFile, line)){
        // Do something here, such as printing the line:
        cout << line << endl;
    }
    // Closes the file
    inFile.close();
    return 0;
}