第十周项目三：血型的计算

#include <iostream>
using namespace std;

int main()
{
char cblood;
int a=0,b=0,o=0,c=0;

do
{
cin>>cblood;
switch (cblood)
{
case 'A':
a++;
break;
case 'B':
b++;
break;
case 'O':
o++;
break;
case 'C':
c++;
break;
}
}
while(cblood!='X');
cout<<"A:"<<a<<" "<<"B:"<<b<<" "<<"O:"<<o<<" "<<"AB:"<<c<<endl;

return 0;
}