年级学生人数计算.cpp

年级人数计算

#include<iostream.h>
#include<iomanip.h>

int main()
{
    int grade,
        aCount=0,
        bCount=0,
        cCount=0,
        dCount=0,
        eCount=0,
        fCount=0;
    
    cout<<"Enter the letter of grade(a,b,c,d,e,f):"<<endl;
    cout<<"Enter the 'z' character to end input."<<endl;
    
    int temp;
    temp=static_cast<int>('z'); 
    
    while( ( grade=cin.get() )!= temp)
    {
      switch(grade)
      {
        case 'A':
        case 'a':
                ++aCount;
                break;
                
        case 'B':
        case 'b':
                ++bCount;
                break;
                
        case 'C':
        case 'c':
                ++cCount;
                break;
                
        case 'D':
        case 'd':
                ++dCount;
                break;
                
        case 'E':
        case 'e':
                ++eCount;
                break;
        
                
        case 'F':
        case 'f':
                ++fCount;
                break;
                
        case '\n':
        case '\t':
        case ' ':
                break;
                 
        default:
                cout<<"Incorrect letter of grade entered!!"
                <<"Enter a new letter of grade."<<endl;
                break;
        
      }
    }
        
        cout<<"Totals for each grade are:"<<endl;
        cout<<"A:"<<setw(20)<<aCount<<endl;
        cout<<"B:"<<setw(20)<<bCount<<endl;
        cout<<"C:"<<setw(20)<<cCount<<endl;
        cout<<"D:"<<setw(20)<<dCount<<endl;
        cout<<"E:"<<setw(20)<<eCount<<endl;
        cout<<"F:"<<setw(20)<<fCount<<endl;
    
    int test;
    cin>>test;
    
    return 0;
}