15.cpp

经典C语言程序设计100例1-10 如【程序1】 题目：有1、2、3、4个数字

/*---------------------------------------例题15-------------------------------------------------------------------*/

#include <iostream>
#include <cmath>

using namespace std;

int main()
{
	float num;
	cout<<"Please input your score:"<<endl;
	cin>>num;
	if(num>=90 && num<=100)
		cout<<"A"<<endl;
	else if(num>=60 && num<=89)
		cout<<"B"<<endl;
	else if(num<60 && num>=0)
		cout<<"C"<<endl;
	else 
		cout<<"error"<<endl;

	return 0;
}