#include <iostream>

#include <time.h>

​

using namespace std;

​

int main()

{

   srand(time(0));             

   cout<<rand()%100<<endl;            //choose random numbers from 0 to 99

   //create random integer value in range a to a+b  (a+rand()b;)

   cout <<1+ rand() % 9 <<endl;   //random numbers between 1 and 10

   cout << 25+rand() % 25 <<endl;   //random numbers between 25 and 50

​

}

​

#include <iostream>

#include <stdlib.h>     

#include <time.h> 

using namespace std;

​

int main()

{

    int num;

    srand(time(0));

        num = rand() % 10 + 1;

        cout << num << endl;

}

​

#include <iostream>

#include <cstdlib>  //required for rand(), srand()

#include <ctime>    //required for time()

using namespace std;

​

int main() {

    srand(time(0));     //randomizing results... (using time as an input)

    const int totalNumbersGenerated = 30;

    const int minRange = 1, maxRange = 20;

​

    cout<<"\nPrinting "<<totalNumbersGenerated<<" random integer numbers (from "<<minRange<<" to "<<maxRange<<"):\n";

    for(int i=1;i<=totalNumbersGenerated;i++){

        //generating random number in specified range (inclusive)

        cout<<1+((rand () % maxRange) + minRange - 1)<<" ";

    }

    cout<<endl;

    return 0;

}

std::srand(std::time(nullptr));         // set rand seed

v1 = std::rand() % 100;         // v1 in the range 0 to 99

v2 = std::rand() % 100 + 1;     // v2 in the range 1 to 100

v3 = std::rand() % 30 + 1985;   // v3 in the range 1985-2014 

#include <cstdlib>

#include <iostream>

#include <ctime>

int main() 

{

    std::srand(std::time(nullptr)); // use current time as seed for random generator

    int random_variable = std::rand();

    std::cout << "Random value on [0 " << RAND_MAX << "]: " 

              << random_variable << '\n';

}

#include <ctime>

​

int main() {

 srand((unsigned) time(0)); 

 int result = 1 + (rand() % 6); // return a number between 1 and 6

}

#include <cstdlib>

#include <ctime>

#include <iostream>

​

using namespace std;

​

int main() {

  srand((unsigned) time(0));

  int randomNumber = rand();

  cout << randomNumber << endl;

}

v1 = rand() % 100;         // v1 in the range 0 to 99 (included)

v2 = rand() % 100 + 1;     // v2 in the range 1 to 100 (included)

v3 = rand() % 30 + 1985;   // v3 in the range 1985-2014 (included)

​

// So in general case :

v4 = rand() % x + y;       // v4 in the range y to y+x-1 (included)

​

// So for a range from a to b (included) you need to write :

v5 = rand() % b-a+1 + a

​

// Or you can imagine that for this :

v6 = rand() % m + n

/* It's a range of m numbers that start at 0 (from 0 to m-1) 

   where we added n to both side. 

   Which become a range of m numbers that start at n (from n to m-1+n) */

/* rand example */

#include <stdio.h>      /* printf, scanf, puts, NULL */

#include <stdlib.h>     /* srand, rand */

#include <time.h>       /* time */

/* initialize random seed: */

srand (time(NULL));

/* generate  number between 1 and 10: */

random_number = rand() % 10 + 1;

v1 = rand() % 100;         // v1 in the range 0 to 99  --Credit goes to Clever cowfish

v2 = rand() % 100 + 1;     // v2 in the range 1 to 100

v3 = rand() % 30 + 1985;   // v3 in the range 1985-2014