// 熱炒99元金額計算器
function menu99(table) {
  let totalNum = 0;
  return function (num) {
    totalNum += num
    document.write(`${table}桌${totalNum === num? '' : '加'}點了${num}盤，共${totalNum * 99}元<br>`);
  };
}

let tableA = menu99('A');
tableA(3)
tableA(3)
tableA(3)


let tableB = menu99('B');
tableB(3)
tableB(5)
tableB(2)