#include <iostream>
#include <cmath>
using namespace std;

int main() {
    //  cout << ceil(5.34) << endl;
    cout << ceil(5.34) << endl;
    cout << exp(3) << endl;

    //  double pi = 3.14159265358979;
    //  double pi = atan2 (0, -1);
    double pi = acos(-1);

    printf ("Value of PI %5.3f in 3 places after the decimal\n", pi);
    printf ("Value of PI %5.3f in 3 places after the decimal\n", pi);
    printf ("Value of PI %7.4f in 4 places after the decimal\n", pi);
    printf ("Value of PI %1.4f in 4 places after the decimal\n", pi);
    printf ("5 is also %1.3f with 3 places after the decimal.\n", 5.0);
    int count = 12;
    printf ("Hello %10d, how are you?\n", count);
    printf ("Hello %-10d, how are you?\n", count);
    printf ("Hello %1d, how are you?\n", count);

    cout << time(NULL) << endl;
    return 0;
}