// Mr. Minich
// Computer Science Using C++
// Ch. 9 Demo Program #3
// January 30, 2000 
// Purpose - to illustrate the use of functions and a global 
//				variable (which is dangerous and usually inappropriate.)

#include <iostream.h>

double gradeCurvingFunction(double studentGrade, int curveAmount);
// Technically parameter names do not have to be specified in a function
// prototype, only the data types. The following function prototype
// would also work,
//			float gradeCurvingFunction(float, int);	

double gGlobalGrade = 0; // this is dangerous!

// NEVER declare variables above/outside of the main function.
// If you do, you had better have a good reason for using what
// is called a "global variable". Global variables should be named
// so that they begin with a lowercase 'g'.

int main()
{          
	int curveAmount = 0;	// the amount of increase

	cout << "Enter the students grade percentage: ";
	cin >> gGlobalGrade;

	cout << "Enter a curve amount of 1, 2, 3 or 4: ";
	cin >> curveAmount;

	cout << "Your new grade is " << 
		gradeCurvingFunction(gGlobalGrade, curveAmount) << endl;

	// A function that returns a value can be used within a
	// cout statement.

	return 0;
} // end of main

double gradeCurvingFunction(double a, int b)
{
	// This function increases a student's grade by a specified
	// amount of percentage points.
	// Technically the parameter identifiers a and b do not have
	// to be the same ones that are used in the function prototype

	return (a + b);

} // end of obtainFavoriteNumber