Help me in solving CPPFALL340 problem

help
,
1

My issue

not solving

My code

#include <iostream>
#include <fstream>

void processFile() {
    std::string inputfilename = "/home/codechef/input.txt";
    std::ifstream inputfile(inputfilename);
    if (!inputfile.is_open()) {
        std::cerr << "Error opening input file\n";
        return;
    }

    std::string outputfilename = "/home/codechef/output.txt";
    std::ofstream outputfile(outputfilename);
    if (!outputfile.is_open()) {
        std::cerr << "Error opening output file\n";
        inputfile.close();
        return;
    }

    int number;

    // Read and write the numbers from the file
    while (inputfile >> number) {
        outputfile << number << '\n';
    }

    inputfile.close();
    outputfile.close();

    // Display the contents of the output file
    inputfile.open(outputfilename);
    if (!inputfile.is_open()) {
        std::cerr << "Error reopening output file\n";
        return;
    }

    std::cout << "Contents of output.txt:\n";
    while (inputfile >> number) {
        std::cout << number << '\n';
    }

    inputfile.close();
}

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

Learning course: Learn Programming and Problem Solving using C++
Problem Link: https://www.codechef.com/learn/course/sit-cpp-fall/SITFALL52/problems/CPPFALL340