PAT1018剪刀锤子布

用类，理解起来相对比较容易。

#include <iostream>
using namespace std;

class B
{
public:
int num;
B():num(0){}
void display()
{
cout<<"B";
}
};

class C
{
public:
int num;
C():num(0){}
void display()
{
cout<<"C";
}
};

class J
{
public:
int num;
J():num(0){}
void display()
{
cout<<"J";
}
};

class NumCount
{
public:
int win;
int tie;
int lose;
B b;
C c;
J j;
NumCount():win(0),tie(0),lose(0){}
void display()
{
cout<<win<<' '<<tie<<' '<<lose<<endl;
}
void winrecord(char a)
{
if(a == 'B')
++b.num;
else if ( a == 'C')
++c.num;
else if ( a == 'J')
++j.num;
}
void windisplay()
{
if( b.num >= c.num && b.num >= j.num)
{
b.display();
}
else if ( c.num >= b.num && c.num >= j.num)
{
c.display();
}
else if ( j.num >= c.num && j.num >= c.num)
{
j.display();
}
}
};

bool comp(char a,char b)
{
if( a == 'B')
{
if( b == 'C')
return 1;
}
else if (a == 'C')
{
if ( b == 'J')
return 1;
}
else if( a == 'J')
{
if ( b == 'B')
return 1;
}
return 0;
}

int main()
{
int n;
cin >> n;
NumCount J,Y;
char j,y;
for (int i=0;i<n;++i)
{
cin >> j >> y;
if( j == y )
{
++J.tie;
++Y.tie;
}
else
{
if( comp(j,y) )
{
++J.win;
++Y.lose;
J.winrecord(j);
}
else
{
++Y.win;
++J.lose;
Y.winrecord(y);
}
}
}
J.display();
Y.display();
J.windisplay();
cout<<' ';
Y.windisplay();
return 0;
}