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ok now for the probs!!!


for (i=2; (i<sqrt(n));i++) {
should have been

for (i=2; (i<=sqrt(n));i++) {

when you "fixed" it, you missed the =

curious why you changed x to i?

also you changed your code from


for (n=2;n<=sqrt(x);n++) {
if((x%n)==0)


to

after testing this, casting int as a double doesnt make a difference to it at all....surprising i know!!!

BUT doing the
int prime=1;

and using an IF to check if prime=0 to display "is prime"...