#include <stdio.h>
#include <string.h>
#include <time.h>
#include <stdlib.h>
float IntervalRand(int from, int to)
{
	int res;

	// Obtain a random interval with rand, then linearly scale
	// it to the interval [from, to]

	// rand returns an integer in [0, RAND_MAX]
	// to scale it to [from, to] we use the equation
	// (rand - 0)/(RAND_MAX -0) * (to-from) + from

	res = (((float)rand() * (to-from))/RAND_MAX)+ from;
	return res;
}
 

main()
{
int seed, i;
float number;
char xaraktiras;
seed = time(NULL);
srand(seed);


FILE *fp;
char x[100];
int a, n, sas;
a = 101;
n = 10001;
while(n > 1000){
printf("parakalo doste ton arithmo n\n");
scanf("%d", &n);
if(n > 1000)
	printf("o arithmos prepi na ine mikroteros i isos toy 1000, parakalo ksanadoste\n");
}

while( a > 100){
printf("parakalo doste to onoma toy arxeioy\n");
scanf("%s", &x);
a = strlen(x);
	if(a > 100)
		printf("prepi to onoma na ine mikrotero twn 100 grammatwn\n");

}
xaraktiras = 'c';
while(xaraktiras != 'b' && xaraktiras != 't'){
	printf("parakalo doste t i b, t gia arxeio keimenoy kai b gia diadiko\n");
	scanf("%s", &xaraktiras);
}
if(xaraktiras == 't'){
	fp = fopen(x, "w");
	fprintf(fp, "%d\n", n);

	for(i = 0; i < n; i++)
		fprintf(fp, "%.4f\n", IntervalRand(10000,0)/10000);
	fclose(fp);
}
else{
	fp = fopen(x, "wb");
	
	fwrite(&n, 2 , 1, fp);
	fclose(fp);
	
}
}