AB编程题--世界杯小组赛

AB编程题--世界杯小组赛

时间: 1ms        内存:128M

描述:

注:本题目自由设计,但必须使用类进行代码设计。

世界杯32支参赛队分为八个小组,每个小组分别有四支球队进行比赛,每支球队都必须和其他三支球队进行且只进行一场比赛,每组4个队循环比赛,共打6场(a1-a2;a1-a3;a1-a4;a2-a3;a2-a4;a3-a4),每场比赛90分钟,胜平负分别积3、1、0分。每个小组积分的前两名球队出线进入淘汰赛阶段的1/8决赛,共16支队,即“16强”。

每个小组分别有四只球队,其排名按以下规则确定:
a、积分高者排名靠前
b、小组中总净胜球高者排名靠前
c、小组中总进球数高者排名靠前
d、不能确定
净胜球数是指进球数(正数)与失球数(正数)的差。
如,红队胜黄队4:2,蓝队胜黄队3:1,红队负蓝队2:3
红队进6球,失5球,净胜球数为:6-5=1
黄队进3球,失7球,净胜球数为:3-7=-4
蓝队进6球,失3球,净胜球数为:6-3=3
//以下是可供参考的代码
#include <stdio.h>
#include <iostream>
#include <string>
using namespace std;

class FootballGroup
{
private:
    int score[4]; //总积分
    int goaldiff[4]; //总净胜球
    int totalgoals[4]; //总进球数
    string teamname[4] ; //球队的名称
public:
    FootballGroup()
    {
        for(int i=0; i<4; i++)
        {
            score[i]=goaldiff[i]=totalgoals[i]=0;
        }
    }
    void setTeamName(int teamindex,string name)  //设置第teamindex+1个队的队名
    {
        teamname[teamindex] = name;
    }
    void addMatchresult(int teamindex1,int teamindex2,int score1,int score2);
    void showResult();
};
int main()
{
    FootballGroup GroupA;
    string name;
    int i,j;
    for(i=0; i<4; i++)
    {
        cin>>name;
        GroupA.setTeamName(i,name); //球队a1,a2,a3,a4的名称
    }
    int score1,score2;
    for(i=0; i<3; i++) //a1-a2;a1-a3;a1-a4;a2-a3;a2-a4;a3-a4
        for(j=i+1; j<4; j++)
        {
            cin>>score1>>score2; //两队的比分
            GroupA.addMatchresult(i,j,score1,score2);
        }
    GroupA.showResult();
    return 0;
}

输入:

第一行 4个参赛队伍的名称
第二行开始到第七行,6场比赛的比分(a1-a2;a1-a3;a1-a4;a2-a3;a2-a4;a3-a4)

输出:

进入淘汰赛阶段的两只球队,如果不能确定,则输出"NO"

示例输入:

a1 a2 a3 a4
1 2
0 0
2 3
3 1
2 2
1 2

示例输出:

a2 a4

提示:

参考答案(内存最优[0]):

#include <stdio.h>
#include <iostream>
#include <string>
#include <cmath>
#include <algorithm>
using namespace std;
struct messa
{
    int score=0;
    int goaldiff=0;
    int totalgoals=0;
    string teamname;
};
bool cmp1(messa a,messa b)
{
    return a.score<b.score;
}
bool cmp2(messa a,messa b)
{
    return a.goaldiff<b.goaldiff;
}
bool cmp3(messa a,messa b)
{
    return a.totalgoals<b.totalgoals;
}
class FootballGroup
{
private:
    messa infor[4];
public:
    FootballGroup(){}
    void setTeamName(int teamindex,string name)  //设置第teamindex+1个队的队名
    {
        infor[teamindex].teamname= name;
    }
    void addMatchresult(int teamindex1,int teamindex2,int score1,int score2);
    void showResult();
    void show()
    {
        for(int i=0; i<4; ++i)
        {
            cout<<infor[i].teamname<<" "<<infor[i].score<<" "<<infor[i].goaldiff<<" "<<infor[i].totalgoals<<endl;
        }
    }
};
void FootballGroup::addMatchresult(int teamindex1,int teamindex2,int score1,int score2)
{
    if(score1>score2)
    {
        infor[teamindex1].score+=3;
    }
    else if(score1<score2)
    {
        infor[teamindex2].score+=3;
    }
    else
    {

        infor[teamindex1].score+=1;
        infor[teamindex2].score+=1;
    }
    infor[teamindex1].goaldiff+=score1-score2;
    infor[teamindex2].goaldiff+=score2-score1;
    infor[teamindex1].totalgoals+=score1;
    infor[teamindex2].totalgoals+=score2;
}
void FootballGroup::showResult()
{
    sort(infor,infor+4,cmp1);
    if(infor[1].score!=infor[2].score)
    {
        cout<<infor[2].teamname<<" "<<infor[3].teamname;
        return ;
    }
    sort(infor,infor+4,cmp2);
    if(infor[1].goaldiff!=infor[2].goaldiff)
    {
        cout<<infor[2].teamname<<" "<<infor[3].teamname;
        return ;
    }
    sort(infor,infor+4,cmp3);
    if(infor[1].totalgoals!=infor[2].totalgoals)
    {
        cout<<infor[2].teamname<<" "<<infor[3].teamname;
        return ;
    }
    cout<<"NO\n";
    return;
}
int main()
{
    FootballGroup GroupA;
    string name;
    int i,j;
    for(i=0; i<4; i++)
    {
        cin>>name;
        GroupA.setTeamName(i,name); //球队a1,a2,a3,a4的名称
    }
    int score1,score2;
    for(i=0; i<3; i++) //a1-a2;a1-a3;a1-a4;a2-a3;a2-a4;a3-a4
        for(j=i+1; j<4; j++)
        {
            cin>>score1>>score2; //两队的比分
            GroupA.addMatchresult(i,j,score1,score2);
        }
   // GroupA.show();
    GroupA.showResult();
    return 0;
}

参考答案(时间最优[0]):

#include <stdio.h>
#include <iostream>
#include <string>
#include<stdlib.h>
using namespace std;
struct Score
{
  int score;
  int goaldiff;
  int totalgoals;
  string teamname;
};
class FootballGroup
{
private:
    //int score[4]; //总积分
    //int goaldiff[4]; //总净胜球
    //int totalgoals[4]; //总进球数
    Score sc[4];
    //string teamname[4] ; //球队的名称
public:
    FootballGroup()
    {
        for(int i=0; i<4; i++)
        {
            sc[i].score=sc[i].goaldiff=sc[i].totalgoals=0;
        }
    }
    void setTeamName(int teamindex,string name)  //设置第teamindex+1个队的队名
    {
        sc[teamindex].teamname = name;
    }
    void addMatchresult(int teamindex1,int teamindex2,int score1,int score2);
    void showResult();
};
void FootballGroup::addMatchresult(int teamindex1,int teamindex2,int score1,int score2)
{
    if(score1>score2)
    {
        sc[teamindex1].score+=3;
        sc[teamindex2].score+=0;
    }
    else if(score1==score2)
    {
        sc[teamindex1].score+=1;
        sc[teamindex2].score+=1;
    }
    else
    {
        sc[teamindex1].score+=0;
        sc[teamindex2].score+=3;
    }
    sc[teamindex1].goaldiff+=(score1-score2);
    sc[teamindex2].goaldiff+=(score2-score1);
    sc[teamindex1].totalgoals+=score1;
    sc[teamindex2].totalgoals+=score2;
}
int cmp(const void *a,const void *b)
{
    Score *p1=(Score *)a,*p2=(Score *)b;
    if(p1->score!=p2->score)
    return p2->score-p1->score;
    else
    {
        if(p1->goaldiff!=p2->goaldiff)
        return p2->goaldiff-p1->goaldiff;
        else
        {
            if(p1->totalgoals!=p2->totalgoals)
            return p2->totalgoals-p1->totalgoals;
        }
    }
}
void FootballGroup::showResult()
{
    qsort(sc,4,sizeof(sc[0]),cmp);
    if(sc[1].score==sc[2].score&&sc[1].goaldiff==sc[2].goaldiff&&sc[1].totalgoals==sc[2].totalgoals)
      cout<<"NO"<<endl;
      else
      {
          cout<<sc[0].teamname<<" "<<sc[1].teamname<<endl;
      }
    /*int i,j;
    for(i=0; i<4; i++)
    {
        max=score[i];
        maxscore=i;
        for(j=i+1; j<4; j++)
        {
            if(max<score[j])
            {
                int temp;
                temp=score[i];
                score[i]=score[j];
                score[j]=temp;
                maxscore=j;
                max=score[j];
            }
            else if(max==score[j])
            {
                if(goaldiff[maxscore]<goaldiff[j])
                {
                    int temp;
                    temp=score[i];
                    score[i]=score[j];
                    score[j]=temp;
                    maxscore=j;
                    max=score[j];
                }
                else if(goaldiff[maxscore]==goaldiff[j])
                {
                    if(totalgoals[maxscore]<totalgoals[j])
                    {
                        int temp;
                        temp=score[i];
                        score[i]=score[j];
                        score[j]=temp;
                        maxscore=j;
                        max=score[j];
                    }
                }
            }
        }
    }*/
}
int main()
{
    FootballGroup GroupA;
    string name;
    int i,j;
    for(i=0; i<4; i++)
    {
        cin>>name;
        GroupA.setTeamName(i,name); //球队a1,a2,a3,a4的名称
    }
    int score1,score2;
    for(i=0; i<3; i++) //a1-a2;a1-a3;a1-a4;a2-a3;a2-a4;a3-a4
        for(j=i+1; j<4; j++)
        {
            cin>>score1>>score2; //两队的比分
            GroupA.addMatchresult(i,j,score1,score2);
        }
    GroupA.showResult();
    return 0;
}

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