Tester

#include <iostream>
#include <ctime>
#include <cstdlib>
#include <cstring>

using namespace std;

clock_t start, stop;

int main(int argc, char *argv[])
{
    strcat(argv[1], " <in >out");
    start=clock();
    system(argv[1]);
    stop=clock();
    cout << "Executing time: " << ((double)(stop-start)/CLOCKS_PER_SEC);
}