6iv.cpp

《C/C＋＋程序设计导论（第二版）》一书的程序源文件

// grades.cpp  Compile a table of student grades
#include <iostream.h>
void main ()
{	int a=0, b=0, c=0, d=0, f=0, grade;
	cout << "Enter grades (ending with -1)" << endl;
	cout << "enter 0 for F, 1 for D, 2 for C, 3 for B, and 4 for A";
	cin >> grade;
	while (grade >= 0)					// sum each grade
	{	if (grade >= 4)  a = a+1;				// category...
		else if (grade >= 3)  b = b+1;
			else if (grade >= 2)  c = c+1;
				else if (grade >= 1)  d = d+1;
					else f = f+1;	
		cin >> grade;
	}
	cout << " A: " << a << " B: " << b << " C: " << c << " D: "
		<< d << " F: " << f << endl;
}