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RAND_MAX

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#define RAND_MAX /* */

, , std::rand. . , 32767. 

#include <climits>
#include <cstdlib>
#include <ctime>
#include <iostream>

int main()
{
    //       
    //    
    std::srand(std::time(NULL));
 
    std::cout << "RAND_MAX: " << RAND_MAX << '\n'
              << "INT_MAX: " << INT_MAX << '\n'
              << "  [0,1]: "
              << static_cast<double>(std::rand()) / RAND_MAX << '\n';
}

: 

RAND_MAX: 2147483647
INT_MAX: 2147483647
  [0,1]: 0.618608


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C RAND_MAX
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