Creates binary file filled with random integers, appends information if file already exists.

13_13.cpp

#include <fstream>
#include <iostream>
#include <ctime>
#include <random>
using namespace std;

int main () {

	// create random array
	int array[100];
	srand(time(0));
	for (int i = 0; i < 100; i++) {
		int tmp = rand() % 10 + 1;
		// cout << i << " = " << tmp << endl;
		array[i] = tmp; // 1-10
	}

	// open and append
	fstream output("Exercise13_13.dat", ios::app | ios::out | ios::binary);
	if (output.is_open()) {
		output.write((char *) &array, sizeof(array));
		output.close();
	}

	return 0;
}