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C++ program to generate random number

  • Difficulty Level : Hard
  • Last Updated : 03 Jan, 2018
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The below implementation is to generate random number from 1 to given limit. The below function produces behavior similar to srand() function.

Prerequisite : random header in C++ | Set 1(Generators)




// C++ program to generate random number
#include <bits/stdc++.h>
using namespace std;
  
// Function with return random number from 1 to
// given limit
int randomNoGenerator(int limit)
{
    // uniformly-distributed integer random number
    // generator that produces non-deterministic
    // random numbers.
    random_device rd;
  
    // A Mersenne Twister pseudo-random generator
    // of 32-bit numbers with a state size of
    // 19937 bits.
    mt19937 gen(rd());
  
    // Uniform distribution
    uniform_int_distribution<> dis(1, limit);
    return dis(gen);
}
  
// Driver Code
int main()
{
    int limit = 100;
    cout << randomNoGenerator(limit) << endl;
    return 0;
}
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