main.cpp

易学c++源码

#include "iostream.h"
void main()
{
	int mark;
	cout <<"请输入成绩（0~100）： ";
	cin >>mark;
	switch(mark/20)
	{
	case 5:
		{
			if (mark>100)
			{
				cout <<"ERROR!" <<endl;
				break;
			}
		}
	case 4:
		{
			cout <<"Good!" <<endl;
			break;
		}
	case 3:
		{
			cout <<"Soso" <<endl;
			break;
		}
	case 2:
	case 1:
	case 0:
		{
			if (mark>=0)
			{
				cout <<"Please work harder!" <<endl;
				break;
			}
		}
	default:
		{
			cout <<"ERROR!" <<endl;
		}
	}
}