ex-lotto.cpp

很好用的随机数产生器

/*                         EX-LOTTO.CPP

   Example of using random library to generate a sequence of integer
   numbers where no number occurs more than once.

   This example generates a Lotto coupon, drawing "select" different
   numbers from the interval from "nmin" to "nmax", inclusive.
*/

#include <time.h>                      // define time()
#include "randomc.h"                   // define random number generator classes
#include "mersenne.cpp"                // choose any random number generator
#include "stocc.h"                     // define random library classes
#include "stoc1.cpp"                   // random library source code
#include "userintf.cpp"                // define system specific interface


void main () {
  // define constants
  const int nmin = 1;                  // set the lowest allowed number
  const int nmax = 36;                 // set the highest allowed number
  const int select = 6;                // the number of numbers to draw  

  long int seed = time(0);             // generate random seed
  StochasticLib sto(seed);             // make instance of random library
  int urn[nmax-nmin+1];                // contains the shuffled numbers
  int i;                               // loop counter

  // Make shuffled list of numbers from nmin to nmax:
  sto.Shuffle(urn, nmin, nmax-nmin+1);

  // output heading text
  printf("Your lucky numbers:\n\n");
  
  // loop to output the first "select" numbers
  for (i=0; i < select; i++) {
    if (i < nmax-nmin+1) {
      // output number
      printf("%4i    ", urn[i]);}}

     
  EndOfProgram();                      // system-specific exit code
  }