I need help in this c code about odd perfect squares

Question

This program should take a positive input from the user and then print all the odd perfect squares before it , and if the user enters a -ve number it should print "please enter a positive number " and take a new value, then again if user enters a -ve number the same previous thing should happen ... the second part about the -ve input is the part I can't implement correctly here , thanx in advance for any help ^^
https://code.sololearn.com/c36jt87dh3i4/?ref=app

Answer 1

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

int main() {
int num;
int i;
printf("Enter a positive number :");
fflush(stdout);
scanf("%d",&num);
for(i=0; i<num; i++){
if (num<0){
printf("Please enter a positive number");
scanf("%d",&num);
fflush(stdout);
}
else
{
if(i % 2 !=0 && (int)sqrt(i)==sqrt(i))
printf("%d ",i);
}
}
return 0;
}

Answer 2

It didn't work out as desired ...
Thanx a lot for your help^^