Как генерировать случайные числа?

#include <iostream>
#include <cstdlib>
#include <ctime>
 
int main ()
{
    srand(time(0));
 
    for (int i = 0; i < 10; i++)
        std::cout << (rand() % 11) << " ";
 
    return 0;
}

#include <ctime>
#include <cstdlib>
int main()
{
   srand(time(NULL));
   int a = rand()%11;
}

// uniform_int_distribution
#include <iostream>
#include <random>
 
int main()
{
  const int nrolls = 10000; // number of experiments
  const int nstars = 95;    // maximum number of stars to distribute
 
  std::default_random_engine generator;
  std::uniform_int_distribution<int> distribution(0,9);
 
  int p[10]={};
 
  for (int i=0; i<nrolls; ++i) {
    int number = distribution(generator);
    ++p[number];
  }
 
  std::cout << "uniform_int_distribution (0,9):" << std::endl;
  for (int i=0; i<10; ++i)
    std::cout << i << ": " << std::string(p[i]*nstars/nrolls,'*') << std::endl;
 
  return 0;
}

int random(int lower_bound, int upper_bound)
{
    return lower_bound + (upper_bound - lower_bound) * static_cast<int>(static_cast<double>(rand()) / RAND_MAX);
}
...
 
int random_value_from_0_till_10 = random(0, 10);

//---------------------------------------------------------------------------
#include <vcl.h>
#include <iostream>
#include <cstdlib>
#include <math>
#include <iomanip>
 
using namespace std;
 
double chisloA(double);
double chisloB(double);
double chisloC(double);
double chisloD(double);
double chisloF(double);
double chisloE(double);
 
int main()
{
        srand(time(0));
        double n;
        cout << "Chislo 1) " << chisloA(n) << endl;
        cout << "Chislo 2) " << chisloB(n) << endl;
        cout << "Chislo 3) " << chisloC(n) << endl;
        cout << "Chislo 4) " << chisloD(n) << endl;
        cout << "Chislo 5) " << chisloF(n) << endl;
        cout << "Chislo 6) " << chisloE(n) << endl;
        system("pause");
        return 0;
}
double chisloA(double n)
{
      return n=1+rand()%2;
}
double chisloB(double n)
{
      return n=1+rand()%100;
}
double chisloC(double n)
{
      return n=0+rand()%9;
}
double chisloD(double n)
{
      return n=1000+rand()%1112;
}
double chisloF(double n)
{
      return n=-1+rand()%1;
}
double chisloE(double n)
{
      return n=-3+rand()%11;
}

//---------------------------------------------------------------------------
#include <vcl.h>
#include <iostream>
#include <cstdlib>
#include <math>
#include <iomanip>
 
using namespace std;
 
int chisloA();
int chisloB();
int chisloC();
int chisloD();
int chisloF();
int chisloE();
 
int main()
{
        srand(time(0));
        cout << "Chislo 1) " << chisloA() << endl;
        cout << "Chislo 2) " << chisloB() << endl;
        cout << "Chislo 3) " << chisloC() << endl;
        cout << "Chislo 4) " << chisloD() << endl;
        cout << "Chislo 5) " << chisloF() << endl;
        cout << "Chislo 6) " << chisloE() << endl;
        system("pause");
        return 0;
}
int chisloA()
{
      return 1+rand()%2;
}
int chisloB()
{
      return 1+rand()%100;
}
int chisloC()
{
      return 0+rand()%9;
}
int chisloD()
{
      return 1000+rand()%1112;
}
int chisloF()
{
      return -1+rand()%1;
}
int chisloE()
{
      return -3+rand()%11;
}

int main()
{
 
    srand( time( 0 ));
 
    cout << "Random number for 1 <= n <= 2 is " << rand() % 2 + 1 << endl;
    cout << "Random number for 1 <= n <= 100 is " << rand() % 100 + 1 << endl;
    cout << "Random number for 0 <= n <= 9 is " << rand() % 10 << endl;
    cout << "Random number for 1000 <= n <= 1112 is " << rand() % 113 + 1000 << endl;
    cout << "Random number for -1 <= n <= 1 is " << rand() % 3 - 1 << endl;
    cout << "Random number for -3 <= n <= 11 is " << rand() % 15 - 3 << endl;
 
    return 0;
}