Thread: Illegal use of floating point

hi!
When I try to run the program below, I get the following error:
Illegal use of floating point.
Can anyone tell me what's wrong?!?!

Code:

#include <stdio.h>
#include <math.h>
 int main ()
 {
float i, x, c;
while ( i <=1000) {
x = pow(2,i);
c= x % i;
if ( c == 2)
printf ("%f\n",i);
i++;
 }
 return 0;
 }

Also you never initialized i. Initialize i to some value:

Code:

float x, c;
float i = 0.0;
while ( i <=1000) {

i've made some changes to the code, but when i run, i get pow: OVERFLOW error. plz help!!

Code:

#include <stdio.h>
#include <math.h>
 int main ()
 {
double i=1, x, c;
while ( i <=10000) {
x = pow(2,i);
c= fmod(x, i);
if ( c == 2)
printf ("%lf\n",i);
i += 2;
 }
 return 0;
 }

> while ( i <=10000)
Make this loop smaller - much smaller

If you really need to go this high, you need another plan - the standard numeric types are not sufficient for very large numbers.