#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[])
{
	FILE *fp; // file pointer
	int n;
	int m;

	if (argc != 3) { // incorrect command line argument
		printf("ERROR! the correct format is:\ngen <file name> <number>\n");
		return 0;
	}

	sscanf(argv[2], "%d", &n); // reads a number from string argv[2]

	fp = fopen(argv[1], "w"); // Open the file for writing
	if (fp == NULL) { // problems in opening file
		printf("ERROR! Cannot open the file %s\n", argv[1]);
		return 0;
	}

	fprintf(fp, "%d\n", n);

	for (int i = 0; i < n; i++) {
		m = rand(); // a random number in the range [0, RAND_MAX]
		fprintf(fp, "%d ", m);
	}

	fclose(fp); // Close the file
}