text: #ifndef RANDOM_H
  #define RANDOM_H
  
  /* random.h is to set random numbers for each element in a matrix */
  
  #include <cstdio>
  #include <ctime>
  #include <cstdlib>
  
  void set_random(int *matrix) {
  	srand((unsigned)time(0));
  	for (int i = 0; i < ELEMENT_NUM; i++)
  		matrix[i] = rand();
  }
  
  #endif
  