// Mr. Minich
// CMPSC 201
// Ch. 2 Demo Program #3
// January 30, 2000 
// Purpose - to illustrate declaration, initialization, and assignment statements.

#include <iostream>
using namespace std;

int main()
{
	int num1 = 1;	// this statement declares AND initializes num1
	int num2, num3; // this statement only declares num2 & num3. While the use
                    //    of the comma is syntactically legal, I prefer that 
                    //    student's declare separate variables with separate statements.

	num2 = 400;	// assigning 400 to num2, not initialization!!!

	// I do not consider the above statement to be an initialization
	// statement. Even if the textbook gives such examples where a
	// variable is assigned a value towards the top of a program as
	// being initialization. Realize that the assignment operator is being
	// used in this line of code and that num2 actually contained
	// a garbage value after it was declared but before it was assigned
	// the value of 400. On the other hand, num1 IS initialized at the
	// top of the program. The equals symbol (=) is not being used as an
	// assignment operator with num1. Later in our course we will more
	// fully understand how it is being used in that true initialization
	// statement.

	num3 = num2;				// assigning value of num2 to num3
	num1 = num2 + 3 * num3;		// use the order of operations

	cout << "num1 = " << num1 << endl;
	// the line above prints "num1 = 1600"

	cout << "num2 = " << num1 * 2 << endl;

	// the line above prints "num2 = 3200" but does not
	// actually change the assigned value of num2 to 3200

	cout << "num2 = " << num2 << endl;
	// the line above prints "num2 = 400"

	return 0;
}// end of main