Basic I/O

#include "string.h"
#include <iostream>
#include <fstream>

using namespace std;


int main(int argc, char** argv){
    int n[] = {1,2,3,4,5};

    ofstream out("test.txt", ios::out | ios::binary | ios::trunc);
    if(! out){
        cout << "cannot open out\n";return 1;
    }

    out.write((char*)&n, sizeof n);
    out.close();
    
    for(int i=0; i<5; i++){
        n[i] = 0;
    }

    ifstream in("test.txt", ios::in | ios::binary);
    if(! in){
        cout << "cannot open in\n";return 1;
    }

    in.read((char*) &n, sizeof n);

    for(i=0; i<5; i++){
        cout << n[i] << endl;
    }

    in.close();
    return 0;
}