Question

给我一个数学问题，必须专门用while循环解决。我尝试了太多方法来解决它，但不幸的是，它们似乎没有用。

这是数学问题本身：

世界杯小组赛即将结束，佩皮想知道他最喜欢的球队是否有资格参加比赛。众所周知，以下规则适用-如果一支球队在一场比赛中进球多于获得的进球，则获胜并获得3分；如果进球和进球数相等，则该团队获得1分；在输的情况下，积分数不会改变。如果从所有比赛中得分的进球总数大于或等于收到的进球数，则该团队最终排名。编写一个计算团队是否合格的程序。

从控制台读取两行：


团队名称-文字；

参加比赛-区间[1…10]中为正整数；


每场比赛都有两个新行：


进球数-[1…10000]区间内的正整数；

收到的目标-在[1…10000]区间内为整数的正数；


控制台上打印两行：


如果团队符合条件：
  “ {team name}以{points}分结束了小组赛阶段。”
  “目标差异：{目标差异}。”

如果团队没有资格：
  “ {team name}已从小组阶段中删除。”
  “目标差异：{目标差异}。”

function solve(input) {

  let name = input.shift();
  let matches_played = Number(input.shift());
  let matches = 0;
  let points_winner = 0;
  let points_loser = 0;
  let goalDifference = 0;
  let total = 0;

  while (matches <= matches_played) {
    let first_team = Number(input.shift());
    let second_team = Number(input.shift());

    if (first_team > second_team) {
      points_winner = points_winner + 3;
    } else if (first_team === second_team) {
      points_winner = points_winner + 1;
    } else if (first_team < second_team) {
      points_winner = points_winner + 0;
    }

    goalDifference = first_team - second_team;
    total = total + goalDifference;

    matches++;
  }

  if (points_winner >= points_loser) {
    console.log(`${name} has finished the group phase with ${points_winner} points.`)
  } else {
    console.log(`${name} has been eliminated from the group phase.`)
    console.log(`Goal difference: ${goalDifference}`)
  }
}

solve(['Brazil', 3, 4, 2, 0, 0, 1, 1])

显示输入后，预期输出为：

Brazil has finished the group phase with 5 points.
Goal difference: 2.

Answer 1

最后的if语句应基于total，而不是points_winner。如果total至少为0，则说明该小组合格。

如果总数小于0，则在显示不足的数量时将其转换为正数。

在最后显示目标差时，您需要使用total。 goalDifference仅包含与上一场比赛的区别。

while条件应为matches < matches_played。如果您使用<=，则将浪费额外的时间并为缺少的数组元素获取undefined，这会导致在将它们添加到NaN时得到total。

function solve(input) {

  let name = input.shift();
  let matches_played = Number(input.shift());
  let matches = 0;
  let points_winner = 0;
  let goalDifference = 0;
  let total = 0;

  while (matches < matches_played) {
    let first_team = Number(input.shift());
    let second_team = Number(input.shift());

    if (first_team > second_team) {
      points_winner = points_winner + 3;
    } else if (first_team === second_team) {
      points_winner = points_winner + 1;
    } else if (first_team < second_team) {
      points_winner = points_winner + 0;
    }

    goalDifference = first_team - second_team;
    total = total + goalDifference;

    matches++;
  }

  if (total >= 0) {
    console.log(`${name} has finished the group phase with ${points_winner} points.`)
    console.log(`Goal difference: ${total}`)
  } else {
    console.log(`${name} has been eliminated from the group phase.`)
    console.log(`Goal difference: ${-total}`)
  }
}

solve(['Brazil', 3, 4, 2, 0, 0, 1, 1])
solve(['Spain', 3, 2, 4, 1, 2, 3, 3])

我遇到了while循环数学问题

1 个答案: