编辑代码

class VotingSystem {
  constructor() {
    this.votes = new Map();
  }

  vote(voterId) {
    if (this.votes.has(voterId)) {
      console.log("您已经投过票了！");
    } else {
      this.votes.set(voterId, true);
      console.log("投票成功！");
    }
  }

  getTotalVotes() {
    return this.votes.size;
  }
}