override def exitRelational_expression(ctx: AllegraParser.Relational_expressionContext) {
    val leftHalf = ctx.primary_expression
    val rightHalf = ctx.additive_expression
    val equals  = ctx.EQUALS
    val nequals = ctx.NEQUALS
    val greater = ctx.GREATER
    val LESS    = ctx.LESS
    val GEQ     = ctx.GEQ
    val LEQ     = ctx.LEQ

    try {
      if(equals != null){
        if(leftHalf.value != rightHalf.value){
          ctx.value = 0
        }
        else{
          ctx.value = 1
        }
      }
      else if(nequals != null ){
        if(leftHalf.value == rightHalf.value){
          ctx.value = 0
        }
        else{
          ctx.value = 1
        }
      }
      else if(LESS != null){
        if(leftHalf.value >= rightHalf.value){
          ctx.value = 0
        }
        else{
          ctx.value = 1
        }
      }
      else if(greater != null){
        if(leftHalf.value <= rightHalf.value){
          ctx.value = 0
        }
        else{
          ctx.value = 1
        }
      }
      else if(GEQ != null){
        if(leftHalf.value < rightHalf.value){
          ctx.value = 0
        }
        else{
          ctx.value = 1
        }
      }
      else if(LEQ != null){
        if(leftHalf.value > rightHalf.value){
          ctx.value = 0
        }
        else{
          ctx.value = 1
        }
      }
    }