#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include <time.h>
 
double timetaken=0;
 
float timer(int T){
	static double then=0.0;
	static double clocks=0;
	double now,diff;
	now=(double)clock()/((double)(CLOCKS_PER_SEC));
	diff=now-then; 
	if (T <= 0) then=now;
	return((float)diff);
}
 
int main(void)
{
	timetaken=timer(0);
	int numPrimes = 0;
	int currentTest = 2;
	int isPrime = 1;
 
	while (numPrimes<10000) {
		for (int i = 2; i < currentTest-1; i++) {
			if (currentTest%i == 0){
				isPrime = 0;
				break;
			}
		}
 
 
		if (isPrime == 1) {
			numPrimes = numPrimes + 1;
			printf("found prime %i %i\n",numPrimes,currentTest);
		}
		isPrime = 1;
		currentTest = currentTest + 1;
	}
	timetaken=timer(1);
	printf("time taken = %f\n",timetaken);
	system("PAUSE");
	return 0;
}