linear congruential generator implemented in CPP

random_lcg.cpp

class random {
 private:
  static long long seed;
  static const long long rand_max = 4294967296;  // 2^32
  static const long long multiplier = 22695477;
  static const long long increament = 1;

 public:
  static void srand(long long s) { seed = s; }
  static long long rand() {
    seed = ((seed * multiplier) + increament) % rand_max;
    return seed;
  }
};

/* Initializing Static Variable */
long long random::seed = 4321;