c 2b 2b generate random numbers

1#include <iostream>
2#include <cstdlib>
3#include <ctime>
4using namespace std;
5
6int main()
7{
8	srand(time(0));
9
10	for (int i = 0; i <= 10; i++)
11	{
12		cout << rand() % 10 << " ";
13	}
14}
15

1#include <cstdlib>
2#include <iostream>
3#include <ctime>
4 
5int main() 
6{
7    std::srand(std::time(nullptr)); // use current time as seed for random generator
8    int random_variable = std::rand();
9    std::cout << "Random value on [0 " << RAND_MAX << "]: " 
10              << random_variable << '\n';
11}

1/* rand example: guess the number */
2#include <stdio.h>      /* printf, scanf, puts, NULL */
3#include <stdlib.h>     /* srand, rand */
4#include <time.h>       /* time */
5
6int main ()
7{
8  int iSecret, iGuess;
9
10  /* initialize random seed: */
11  srand (time(NULL));
12
13  /* generate secret number between 1 and 10: */
14  iSecret = rand() % 10 + 1;
15
16  do {
17    printf ("Guess the number (1 to 10): ");
18    scanf ("%d",&iGuess);
19    if (iSecret<iGuess) puts ("The secret number is lower");
20    else if (iSecret>iGuess) puts ("The secret number is higher");
21  } while (iSecret!=iGuess);
22
23  puts ("Congratulations!");
24  return 0;
25}

1#include <iostream>
2#include <stdlib.h>
3#include <time.h>
4using namespace std;
5int main() {
6	srand(time(NULL)	);
7	const char arrayNum[7] = {'0', '1', '2', '3', '4', '5', '6'};
8	int RandIndex = rand() % 7;
9	cout<<RandIndex<<endl;
10	return 0;
11}

1#include <iostream> 
2#include <ctime> 
3#include <cstdlib>
4
5using namespace std;
6
7int main() 
8{ 
9    srand((unsigned)time(0)); 
10    int random_integer; 
11    int lowest=1, highest=10; 
12    int range=(highest-lowest)+1; 
13    for(int index=0; index<20; index++){ 
14        random_integer = lowest+int(range*rand()/(RAND_MAX + 1.0)); 
15        cout << random_integer << endl; 
16    } 
17}

1/*The problem with srand(time(NULL)) and rand() is that if you use them
2in a loop it'll probably be executed during the same clock period
3and therefore rand() will return the same number. To solve this
4you can use the library random to help you.*/
5
6#include <random>
7
8std::random_device rd;
9std::mt19937 e{rd()};
10std::uniform_int_distribution<int> dist{1, 5}; //Limits of the interval
11//Returns a random number between {1, 5} with
12dist(e);