task2

learn/yushui468/task2/index.ts

@@ -0,0 +1,40 @@
+class VoteCounter {
+    private votes: { [key: string]: 'yes' | 'no' } = {};
+    private teamMembers: Set<string>;
+    constructor(members: string[]) {
+        this.teamMembers = new Set(members);
+    }
+    public vote(voter: string, vote: 'yes' | 'no'): string {
+        if (!this.teamMembers.has(voter)) {
+            return `${voter} 不是团队成员，无法投票。`;
+        }
+        if (this.votes[voter]) {
+            return `${voter} 已经投过票。`;
+        }
+        this.votes[voter] = vote;
+        return `${voter} 投票成功，选择了 ${vote === 'yes' ? '赞成' : '反对'}`;
+    }
+    public tallyVotes(): { yes: number; no: number } {
+        let yesCount = 0;
+        let noCount = 0;
+
+        for (const vote of Object.values(this.votes)) {
+            if (vote === 'yes') {
+                yesCount++;
+            } else {
+                noCount++;
+            }
+        }
+        return { yes: yesCount, no: noCount };
+    }
+}
+
+const members = ['zhangsan', 'lisi', 'wanger'];
+const voteCounter = new VoteCounter(members);
+console.log(voteCounter.vote('zhangsan', 'yes'));
+console.log(voteCounter.vote('lisi', 'no'));  
+console.log(voteCounter.vote('wanger', 'yes')); 
+console.log(voteCounter.vote('zhangsan', 'no'));
+
+const results = voteCounter.tallyVotes();
+console.log(`赞成票: ${results.yes}, 反对票: ${results.no}`);