Question

can someone help write a simple c++ code that inputs a file and decrypts it using ascii code -4.

Answer 1

#include <iostream>
#include <fstream>
#include <string>
using namespace std;

int main() {
    string fileName;
    cout << "Enter file name: ";
    cin >> fileName;
    ifstream in(fileName.c_str());
    if(in.is_open()) {
        string line, result;
        while (getline(in, line)) {
            for (int i = 0; i < line.size(); ++i) {
                result += (char)(line[i]-4);
            }
            cout << result << endl;
        }
        in.close();
    } else {
        cout << fileName << " does not exists!" << endl;
    }
    return 0;
}