Description
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;
}
Input
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)
Output
进入淘汰赛阶段的两只球队,如果不能确定,则输出"NO"
Sample Input
a1 a2 a3 a4 1 2 0 0 2 3 3 1 2 2 1 2
Sample Output
a2 a4
HINT
代码如下:
#include <stdio.h> #include <iostream> #include <cstring> 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(); }; void FootballGroup::addMatchresult(int teamindex1,int teamindex2,int score1,int score2) { if(score1>score2) { score[teamindex1]+=3; goaldiff[teamindex1]+=score1-score2; goaldiff[teamindex2]+=score2-score1; totalgoals[teamindex1]+=score1; totalgoals[teamindex2]+=score2; } else if(score1<score2) { score[teamindex2]+=3; goaldiff[teamindex1]+=score1-score2; goaldiff[teamindex2]+=score2-score1; totalgoals[teamindex1]+=score1; totalgoals[teamindex2]+=score2; } else { score[teamindex1]+=1; totalgoals[teamindex1]+=score1; score[teamindex2]+=1; totalgoals[teamindex2]+=score2; } } void FootballGroup::showResult() { int i,j,t1,t2,t3; string c; for(i=0; i<3; i++) for(j=i+1; j<4; j++) { if(score[j]>score[i]) { t1=score[i]; score[i]=score[j]; score[j]=t1; t2=goaldiff[i]; goaldiff[i]=goaldiff[j]; goaldiff[j]=t2; t3=totalgoals[i]; totalgoals[i]=totalgoals[j]; totalgoals[j]=t3; c=teamname[i]; teamname[i]=teamname[j]; teamname[j]=c; } } if(score[1]!=score[2]) cout<<teamname[0]<<" "<<teamname[1]<<endl; else if (score[0]!=score[1]&&score[1]==score[2]&&score[2]!=score[3]) { for(i=1; i<2; i++) for(j=i+1; j<3; j++) { if(goaldiff[j]>goaldiff[i]) { t1=score[i]; score[i]=score[j]; score[j]=t1; t2=goaldiff[i]; goaldiff[i]=goaldiff[j]; goaldiff[j]=t2; t3=totalgoals[i]; totalgoals[i]=totalgoals[j]; totalgoals[j]=t3; c=teamname[i]; teamname[i]=teamname[j]; teamname[j]=c; } } if (goaldiff[1]!=goaldiff[2]) { cout<<teamname[0]<<" "<<teamname[1]<<endl; } else { if (totalgoals[1]>totalgoals[2]) cout<<teamname[0]<<" "<<teamname[1]<<endl; else if(totalgoals[1]<totalgoals[2]) cout<<teamname[0]<<" "<<teamname[2]<<endl; else cout<<"NO"<<endl; } } else if (score[0]!=score[1]&&score[1]==score[2]&&score[2]==score[3]) { for(i=1; i<3; i++) for(j=i+1; j<4; j++) { if(goaldiff[j]>goaldiff[i]) { t1=score[i]; score[i]=score[j]; score[j]=t1; t2=goaldiff[i]; goaldiff[i]=goaldiff[j]; goaldiff[j]=t2; t3=totalgoals[i]; totalgoals[i]=totalgoals[j]; totalgoals[j]=t3; c=teamname[i]; teamname[i]=teamname[j]; teamname[j]=c; } } if (goaldiff[1]!=goaldiff[2]) { cout<<teamname[0]<<" "<<teamname[1]<<endl; } else if (goaldiff[1]==goaldiff[2]&&goaldiff[2]!=goaldiff[3]) { if (totalgoals[1]>totalgoals[2]) cout<<teamname[0]<<" "<<teamname[1]<<endl; else if(totalgoals[1]<totalgoals[2]) cout<<teamname[0]<<" "<<teamname[2]<<endl; else cout<<"NO"<<endl; } else if (goaldiff[1]==goaldiff[2]&&goaldiff[2]==goaldiff[3]) { for(i=1; i<3; i++) for(j=i+1; j<4; j++) { if(totalgoals[j]>totalgoals[i]) { t1=score[i]; score[i]=score[j]; score[j]=t1; t2=goaldiff[i]; goaldiff[i]=goaldiff[j]; goaldiff[j]=t2; t3=totalgoals[i]; totalgoals[i]=totalgoals[j]; totalgoals[j]=t3; c=teamname[i]; teamname[i]=teamname[j]; teamname[j]=c; } } if (totalgoals[1]!=totalgoals[2]) cout<<teamname[0]<<" "<<teamname[1]<<endl; else cout<<"NO"<<endl; } } else if(score[1]==score[2]&&score[0]==score[1]&&score[2]==score[3]) { for(i=0; i<3; i++) for(j=i+1; j<4; j++) { if(goaldiff[j]>goaldiff[i]) { t1=score[i]; score[i]=score[j]; score[j]=t1; t2=goaldiff[i]; goaldiff[i]=goaldiff[j]; goaldiff[j]=t2; t3=totalgoals[i]; totalgoals[i]=totalgoals[j]; totalgoals[j]=t3; c=teamname[i]; teamname[i]=teamname[j]; teamname[j]=c; } } if(goaldiff[1]!=goaldiff[2]) { cout<<teamname[0]<<" "<<teamname[1]<<endl; } else if (goaldiff[0]!=goaldiff[1]&&goaldiff[1]==goaldiff[2]&&goaldiff[2]!=goaldiff[3]) { if (totalgoals[1]>totalgoals[2]) cout<<teamname[0]<<" "<<teamname[1]<<endl; else if(totalgoals[1]<totalgoals[2]) cout<<teamname[0]<<" "<<teamname[2]<<endl; else cout<<"NO"<<endl; } else if (goaldiff[0]!=goaldiff[1]&&goaldiff[1]==goaldiff[2]&&goaldiff[2]==goaldiff[3]) { for(i=1; i<3; i++) for(j=i+1; j<4; j++) { if(totalgoals[j]>totalgoals[i]) { t1=score[i]; score[i]=score[j]; score[j]=t1; t2=goaldiff[i]; goaldiff[i]=goaldiff[j]; goaldiff[j]=t2; t3=totalgoals[i]; totalgoals[i]=totalgoals[j]; totalgoals[j]=t3; c=teamname[i]; teamname[i]=teamname[j]; teamname[j]=c; } } if (totalgoals[1]!=totalgoals[2]) cout<<teamname[0]<<" "<<teamname[1]<<endl; else cout<<"NO"<<endl; } else if(goaldiff[0]==goaldiff[1]&&goaldiff[1]==goaldiff[2]&&goaldiff[2]!=goaldiff[3]) { for(i=0; i<2; i++) for(j=i+1; j<3; j++) { if(totalgoals[j]>totalgoals[i]) { t1=score[i]; score[i]=score[j]; score[j]=t1; t2=goaldiff[i]; goaldiff[i]=goaldiff[j]; goaldiff[j]=t2; t3=totalgoals[i]; totalgoals[i]=totalgoals[j]; totalgoals[j]=t3; c=teamname[i]; teamname[i]=teamname[j]; teamname[j]=c; } } if(totalgoals[0]!=totalgoals[1]&&totalgoals[1]!=totalgoals[2]) cout<<teamname[0]<<" "<<teamname[1]<<endl; else cout<<"NO"<<endl; } else if(goaldiff[0]==goaldiff[1]&&goaldiff[1]==goaldiff[2]&&goaldiff[2]==goaldiff[3]) { for(i=0; i<3; i++) for(j=i+1; j<4; j++) { if(totalgoals[j]>totalgoals[i]) { t1=score[i]; score[i]=score[j]; score[j]=t1; t2=goaldiff[i]; goaldiff[i]=goaldiff[j]; goaldiff[j]=t2; t3=totalgoals[i]; totalgoals[i]=totalgoals[j]; totalgoals[j]=t3; c=teamname[i]; teamname[i]=teamname[j]; teamname[j]=c; } } if(totalgoals[1]!=totalgoals[2]) cout<<teamname[0]<<" "<<teamname[1]<<endl; else cout<<"NO"<<endl; } } } 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; }
运行结果:
学习心得:
好久没有在刷题上这么激动过了,,,这道题分析得,,,可真是辛苦,,,用时一个多小时终究还是做出来了,听说是去年13届的考题,当时只有少数几个人做出来了哈哈~
题目代码有些冗长,,,是一步一步分析来的,可能有优化方法,但是我已经不想去想了,有个地方可以改正一下,将所有的比较交换归纳成一个函数,其实开始的时候也是这么做的,但是当时出现了一个失误,只交换了比较的那个值和名字,另外两项并没有交换,所以之前做错了。可以在CLASS中添加一个函数sort排序,但是然后交换CLass中所有的数据成员,有意向的可以自行修改,我这里就不再修改,自接提交了。
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