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cpp random int

Kevin Mac Mahon 
#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';
}
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4
2
ArsedianIvan 75 points 

                                    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

4 (2 Votes)
0
4.5
4
Ullallulloo 80 points 

                                    v1 = rand() % 100;         // v1 in the range 0 to 99
v2 = rand() % 100 + 1;     // v2 in the range 1 to 100
v3 = rand() % 30 + 1985;   // v3 in the range 1985-2014

4.5 (4 Votes)
0
3.67
6
Abhijeet Melkani 95 points 

                                    /*The problem with srand(time(NULL)) and rand() is that if you use them
in a loop it'll probably be executed during the same clock period
and therefore rand() will return the same number. To solve this
you can use the library random to help you.*/

#include &lt;random&gt;

std::random_device rd;
std::mt19937 e{rd()};
std::uniform_int_distribution&lt;int&gt; dist{1, 5}; //Limits of the interval
//Returns a random number between {1, 5} with
dist(e);

3.67 (6 Votes)
0
4
1
Rthavi 100 points 

                                    /* rand example: guess the number */
#include &lt;stdio.h&gt;      /* printf, scanf, puts, NULL */
#include &lt;stdlib.h&gt;     /* srand, rand */
#include &lt;time.h&gt;       /* time */

int main ()
{
  int iSecret, iGuess;

  /* initialize random seed: */
  srand (time(NULL));

  /* generate secret number between 1 and 10: */
  iSecret = rand() % 10 + 1;

  do {
    printf (&quot;Guess the number (1 to 10): &quot;);
    scanf (&quot;%d&quot;,&amp;iGuess);
    if (iSecret&lt;iGuess) puts (&quot;The secret number is lower&quot;);
    else if (iSecret&gt;iGuess) puts (&quot;The secret number is higher&quot;);
  } while (iSecret!=iGuess);

  puts (&quot;Congratulations!&quot;);
  return 0;
}

4 (1 Votes)
0
3.6
10
Christopher ohlrich 105 points 

                                    #include &lt;iostream&gt; 
#include &lt;ctime&gt; 
#include &lt;cstdlib&gt;

using namespace std;

int main() 
{ 
    srand((unsigned)time(0)); 
    int random_integer; 
    int lowest=1, highest=10; 
    int range=(highest-lowest)+1; 
    for(int index=0; index&lt;20; index++){ 
        random_integer = lowest+int(range*rand()/(RAND_MAX + 1.0)); 
        cout &lt;&lt; random_integer &lt;&lt; endl; 
    } 
}

3.6 (10 Votes)
0
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