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

void Usage(void){
	printf("./command <number>\n");
}

int main(int argc, char **argv)
{
	int n1 = 0;
	if(argc != 2){
		Usage();
		exit(1);
	}
	int n2 = atoi((const char *)argv[1]);
	printf("number entered: %d\n", n2);

	FILE *fp = fopen("naglfar.txt", "w");
	if(fp == NULL){
		printf("Cannot open file!\n");
		exit(1);
	}
	for(n1 = 1; n1 <= n2; n1++){
		fprintf(fp, "%d \n", n1);
	}

	fclose(fp);
	return 0;
}