generate.cpp

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

int main(int argc, char *argv[])
{
	if (argc < 4)
	{
		cout << "Please enter 3 parameters:\n";
		cout << "     Parameter 1: total count of numbers you want.\n";
		cout << "     Parameter 2: min value.\n";
		cout << "     Parameter 3: max value.\n";
		cout << "Example: %generate 10000000 100000 999999\n";
		exit(EXIT_SUCCESS);
	}

	for (int i=0; i<argc; i++)
	{
		cout << "argv["<<i<<"]:"<<argv[i]<< endl;
	}
	int COUNT = stoi(argv[1]);
	int MIN = stoi(argv[2]);
	int MAX = stoi(argv[3]);

	ofstream fout;
	fout.open("numbers.txt", ios::out | ios::trunc);
	for (int i = 0; i < COUNT; i++)
	{
		fout << (rand() % ( MAX-MIN+1) + MIN) << endl;
	}
	fout.close();
	return 0;
}

		// basic file operations
		// #include <iostream>
		// #include <fstream>
		// using namespace std;
		//
		// int main () {
		//   ofstream myfile;
		//     myfile.open ("example.txt");
		//       myfile << "Writing this to a file.\n";
		//         myfile.close();
		//           return 0;
		//           }