Single Grade Program

				
//**************************************
// Name: Single Grade Program
// Description:It takes in a number(grade) and it give you back a letter grade!
This is my very first program and great feedback would be appreciated on how I can improve my code and as a programmer!
// By: Anderson Reyes
//
//This code is copyrighted and has// limited warranties.Please see http://www.Planet-Source-Code.com/vb/scripts/ShowCode.asp?txtCodeId=14203&lngWId=3//for details.//**************************************

#include <iostream>
using namespace std;
int main()
{
	int Grade;
	cout <<"Please Enter your Grade: " << endl;
	cin >> Grade; //THE USER INPUT FOR THE GRADE(NUMBER)
	
	//THE LOGIC FOR THE NUMBER THAT YOU INPUT. ANY NUMBER LOWER THAN A 59 WILL RESULT IN AN F
	if(Grade == 100){
		cout << "You Have Perfect Grade!! a A+" << endl;
	}
	else if(Grade >= 90 && Grade <= 99){
		cout << "Your grade is a A" << endl;
	}
	else if(Grade >= 80 && Grade <= 89){
		cout << "Your grade is a B" << endl;
	}
	else if (Grade >= 70 && Grade <= 79){
		cout << "Your grade is a C" << endl;
	}
	else if (Grade >= 60 && Grade <= 69){
		cout << "Your grade is a D" << endl;
	}
	else if(Grade <= 59){
		cout << "YOU FAILED!!!......OUCH." << endl;
	}
	else{
		cout << "Error" << endl;
	}
	system("pause");
	return 0;
}