6v.cpp

C/C++程序设计导论（第二版）》程序源文件

// grades2.cpp  Compile a table of student grades
#include <iostream.h>
void main ()
{	int a=0, b=0, c=0, d=0, f=0;
	char grade;
	cout << "Enter grades (ending with the letter X)" << endl;
	cin >> grade;
	while (grade != 'x')					// sum each grade
	{	if (grade == 'A')  a = a+1;				// category...
		else if (grade == 'B')  b = b+1;
			else if (grade == 'C')  c = c+1;
				else if (grade == 'D')  d = d+1;
					else if (grade == 'F') f = f+1;		// assume others are `F'
					     else ;		// ignore others
		cin >> grade;
	}
	cout << " A: " << a << " B: " << b << " C: " << c << " D: "
		<< d << " F: " << f << endl;
}