text: #include <stdio.h>
  #include <stdlib.h>
  
  #include "tool.h"
  
  /* Return random value between min and max
   * @param minimum value(double), maximum value(double)
   */
  double RandNum(double min, double max){
     return (min) + (max - min) * ((double)rand() / (double)RAND_MAX);
  }
  