C#

public struct Symbol {

   private char keyword;
   private int defibrilator;
   private bool passDefibrilator;
   private int index;

   public symbol( char keyword, int defibrilator, bool passDefibrilator, int index) {
      this.keyword = keyword;
      this.defibrilator = defibrilator;
      this.passDefibrilator = passDefibrilator;
      this.index = index;
   }

   public char Keyword { get { return this.keyword; } }
   public int Defibrilator { get { return this.defibrilator; } }
   public bool PassDefibrilator { get { return this.passDefibrilator; } }
   public int Index { get { return this.index; } }

}

Symbol[] symbols = new Symbol[] {
   new Symbol('a', 42, true, 1),
   new Symbol('b', 8, false, 5),
   new Symbol('c', 199866, false, 377378423),
};