time measurment example

#include <iostream>
#include <ctime> // or <time.h> for old compilers

void func();

int main()
{
    using namespace std;

    clock_t start, finish;
    double total(0);

    start = clock();
    func();
    finish = clock();
    total = (double)(finish - start)/CLOCKS_PER_SEC;
    cout << total << " seconds\n";

    return 0;
}

void func()
{
    for (long i = 0; i < 1000000000; i++)
        ;
}