// *****************************************************************
// Author:	Zhixiang Chen
// Class:	CSCI/CMPE 1170, Spring 2008
// Lab 6:	Logical expressions and if statement
// Date:	January 12, 2009
// Comment: The code here is meant to be revised.
//
//----------------------------------------------------------------- 
//
// This lab exercise is to play with logical expressions compised of 
// relational and logical operators, if-statements, if-else-statements,
// chained if-else-statements, nested if-statements
//
// The problem here is to compute the letter grade for the user when 
// the score is entered. The formula to do the calculation is as follows: 
// A if 90<=score; B is 80<=score <90; C if 70<=score<80; D if 
// 60 <=score <70; F if otherwise.
//
// Compile and run your program. When everything is fine,
// print your .cpp file and turn it to me or the TA.
// *****************************************************************

#include < iostream >
#include <fstream >
#include < string >
#include < cstring >
#include < cmath> 
#include <cstdlib>
#include <iomanip>

using namespace std; 

int main( )
{
	//variable declaration
	double score;		//var to store score for the class

	
	//ask for score from the user
	cout<<"What is your score for the class? ==> "; 
	cin>>score; 

	/*******************************************************************
	 Part A. Use if-statements only.
	 I do two statements and you do the rest.
	 ******************************************************************/
	if (score >= 90)
		cout<< "Your grade is A." <<endl; 
	if (80 <= score and score < 90)
		cout<<"Your grade is B." <<endl; 


	/*******************************************************************
	 Part B. Use if-else-statements only.
	 I do two statements and you do the rest.
	 ******************************************************************/
	if (score >=90)
		cout<< "Your grade is A." <<endl; 
	else if (80 <= score and score < 90)
		cout<<"Your grade is B." <<endl; 

	/*******************************************************************
	 Part C. Use if-else-statements only.
	 I do two statements and you do the rest.
	 ******************************************************************/
	if (score >70)
	{
		cout<< "You passed the class. And, your grade is " <<endl; 
		if (score >= 90)
			cout<<" A " <<endl; 
		else if 
		/***** finish this part ******/ 
		

	} else if 
		/***** finish this part *****/



	//well done and exit
	return 0; 
}