7vii.cpp

《C/C＋＋程序设计导论（第二版）》一书的程序源文件

// grades3.cpp  Compile a table of student grades
#include <iostream.h>
void main()
{	int a, b, c, d, f;
	char grade;
	a = b = c = d = f = 0;
	cout << "Enter grades (ending with letter X)" << endl;
	cin >> grade;
	while (grade != 'X')
	{	switch (grade)
		{	case 'A':			a++;  break;
			case 'B':			b++;  break;
			case 'C':			c++;  break;
			case 'D':			d++;  break;
			case 'F':			f++;   break;
			default:			cout << "illegal grade";
		}
		cin >> grade;
	}
	cout << "A: " << a << " B: " << b << " C: " << c << " D: " <<
		d << " F: " << f << endl;
}