Any idea why this program is not generating an output ?

#include <stdio.h>
#include <math.h>
#define M_PI 3.14159

int main(void)
{
double theta, phi, sinth;
double count;
double incr;
double s;

s = 180/M_PI; /* converting to radians */
incr = 0.5;
theta = 0;

for(theta = incr; theta < 180; theta += incr)
sinth = sin(s *theta);
for(phi = 0; phi < 360 ; phi += incr/ sinth)
count ++;
printf("%f", count);
return 0;
}
.

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