Question

1. Assume there was a valid file called cards.txt in the current directory containing 5 valid int values, each on its own line. It is needed to write the function that reads all values from file and then prints out: "lucky 7!" to the screen for every 7 it sees. Use the signature: void printSevens();

Answer 1

#include <iostream>
#include <fstream>

using namespace std;

void printSevens();

int main() {
    printSevens();
    return 0;
}

void printSevens() {
    ifstream inStream("cards.txt");
    if (inStream.is_open()) {
        int number;
        while (inStream >> number) {
            if (number == 7) {
                cout << "Lucky 7!" << endl;
            }
        }
        inStream.close();
    } else {
        cout << "can't find cards.txt!" << endl;
    }
}