Question

1. use c++

write a c++ program that reads 10 integers from a file named input.txt in this file the 10 integers wil be on a single line with space between the. calculate the average of these numbers and then write his number to a file named output.txt. if the program is unable to successfully complete the file operations then display eero message to the console.

Answer 1

#include <iostream>
#include <fstream>
#include <string>

using namespace std;

int main() {
    ifstream in("input.txt");
    if (in.is_open()) { // open file
        double total = 0, count = 0;    // initialize total and count to 0
        double num;
        while (in >> num) { // read numbers from file
            total += num;   // add number to total
            ++count;    // increase count by 1
        }
        ofstream out("output.txt");
        out << total / count << endl;    // print average to output file
        in.close(); // close input file
        out.close(); // close output file
    } else {
        cout << "input.txt does not exists!" << endl;
    }
    return 0;
}