I am not too sure about c++. I have this program so i can perform a test on it against java. It looks like
#include "stdafx.h"
#include <iostream>
#include <math.h>
#include <sys/time.h>
using namespace std;
double generate(int max) {
struct timeval start;
struct timezone tz;
gettimeofday(&start, &tz);
bool *sieve = new bool[max];
for (int i=0; i<max; i++) sieve[i] = true;
sieve[0] = false;
sieve[1] = false;
for (int n=2; n<sqrt(max); n++) {
if (sieve[n]) {
for (int j=2*n; j<max; j+=n)
sieve[j] = false;
}
}
struct timeval end;
gettimeofday(&end, &tz);
double startSecond = start.tv_usec/1000000.0;
double endSecond = (end.tv_sec - start.tv_sec) + end.tv_usec/1000000.0;
return endSecond - startSecond;
}
int main(int argc, char * argv[])
{
for (int i=100000; i<=5000000; i+=100000) {
double time = generate(i);
cout << i << " " << time << "\n";
}
}It says at the moment that
1>c:\users\nick\desktop\dd\dd\dd.cpp(4) : fatal error C1083: Cannot open include file: 'sys/time.h': No such file or directory
How would i go about resolving this issue?
thanks
