/*

Author: Arun Somasundaram, CSE Dept, OSU.

Simple program for File Input/Output (Txt and Binary Format)
  
*/

#include <iostream>
#include <fstream>

using namespace std;

void writeTextFile(){
    
    cout << "Writing text file" << endl;
    ofstream oFile;

    oFile.open("out.txt");
    oFile << "Line 1 of file" << endl;
    oFile << "Line 2 of file";
    oFile.close();
    
}

void readTextFile(){

    cout << "Reading text file" << endl;
    string line;
    ifstream iFile ("out.txt");
    if (iFile.is_open()){
	while (!iFile.eof()){
	    getline (iFile, line);
	    cout << line << " 1 " << endl;
	}
	iFile.close();
    }
    else {
	cout << "Unable to open file." << endl;
    }
    
}

void writeBinaryFile(){
    
    cout << "Writing Binary file " << endl;
    ofstream oFile("out.bin", ios::binary);
    int num = 16;
    int *sequence = new int[num];
    for(int i = 0; i < num; i++){
	sequence[i] = i*i;
    }
    //write takes char * as first argument
    //So reinterpret_cast it
    oFile.write(reinterpret_cast<char *>(sequence), num*sizeof(int));
    oFile.close();
    delete [] sequence;
}


void readBinaryFile(){
    
    cout << "Reading Binary file" << endl;
    ifstream iFile("out.bin", ios::binary | ios::ate);
    if (iFile.is_open()){
	int num = iFile.tellg();
	num /= sizeof(int);
	int *sequence = new int[num];
	iFile.seekg(0, ios::beg);
	//read takes char * as first argument
	//So reinterpret_cast it
	iFile.read(reinterpret_cast<char*>(sequence), num*sizeof(int));
	iFile.close();
	for(int i = 0; i < num; i++){
	    cout << sequence[i] << " ";
	}
	delete [] sequence;
    }
    else {
	cout << "Unable to open file." << endl;
    }
    
}


int main(){

    writeTextFile();
    readTextFile();

    writeBinaryFile();
    readBinaryFile();
    
    return 0;

}