zadanka

pierwsze:

#include <iostream>
#include <cmath>
#include <iomanip>

using namespace std;

int main() {

int r;
cout << "Wprowadz wartosc promienia: ";
cin >> r;

long double pole = 4*M_PI*r*r;
long double objetosc = 4/3*M_PI*r*r*r;

cout << "Pole powierzchni kuli: " << "********" << pole << endl;
cout << "Objetosc kuli: " << setprecision(7) << objetosc << endl;

  return 0;
}

===========================================================
trzecie:

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

using namespace std;

int main() {

  srand(time(NULL));
  int liczba = -32+rand()%(61);
  cout << "Wygenerowana liczba to: " << liczba << endl;

  return 0;
}

==========================================================
czwarte:

#include <iostream>
#include <ctime>

using namespace std;

int main() {

  int wybor;

  while (wybor!=4) {
  cout << "-=-PROGRAM-=-" << endl;
  cout << "1. Dane ucznia" << endl;
  cout << "2. Aktualna data" << endl;
  cout << "3. Oblicz pole kwadratu!" << endl;
  cout << "4. Zakonczenie programu" << endl;

  cout << endl;
  cout << "Wybierz opcje: ";
  cin >> wybor;

  switch(wybor){
    case 1:
      cout << "Kamila Butrym" << endl;
      cout << endl;
      break;
    case 2:
      cout << __DATE__ << endl;
      cout << endl;
      break;
    case 3:
      int a;
      cout << "Podaj dlugosc boku: ";
      cin >> a;
      cout << "Pole kwadratu to: " << a*a << endl;
      cout << endl;
      break;
    case 4:
      exit(1);
    default:
      cout << "Bledne dane!" << endl;
       cout << endl;
    }

  }

  return 0;
}

====================================================================
piate (robisz to na kartce, ale kod mi pomogl to rozwiazac):

#include <iostream>

using namespace std;

int main(){

  int a=6; int b=4; int c=15;

  b*=2;
  c/=4;

  cout << "wartosc b: " << b << endl;
  cout << "wartosc c: " << c << endl;

  cout << "8-3 = " << b-c << endl;

  cout << "++b = " << ++b << endl;
  cout << "c-- = " << c-- << endl;
  cout << "wartosc c: " << c << endl;

  a/=11;

  cout << "a/= " << a << endl;

  return 0;
}