#include <stdio.h>
#pragma warning(disable : 4996)

// CSE 240 Fall 2016 Homework 2 Question 3 (25 points)
// Note: You may notice some warnings for variables when you compile in GCC, that is okay.

#define macro_1(x) ((x > 0) ? (x -1) : 0)
#define macro_2(a, b) (3*a - 3*b*b + 4*a * b - a*b * 10)

int function_1(int a, int b) {
	return (3*a - 3*b*b + 4*a * b - a*b * 10);
}

// Part 1:
// It appears that the result of macro_1 should be 5, why is the result 6? Correct the error. (5 points)
void part1(int x) {

	int m = x, result;

	result = macro_1(++m);

	printf("macro_1(%d) = %d\n\n", (++x), result);

	// Why did this error occur? Please provide the answer in your own words below following "Explanation: "
	printf("Initially x = 4. The macro is preprocessed. x++ is incremented twice while running this code. The first time \n"
	        "was while comparing whether the value is greater than 0. Since it was, x++ is the result for return.\n"
	       "This comes from the fact that this is preprocessed and whe are sending a ++ in to compare. I fixed this by adding a --\n"
	       "to the return value\n\n\n"); // (5 points)
}


// Part 2:
// Run this program in Visual Studio and then again in GCC. Take note of the output values for function_1(x,y) and macro_2(x,y).
void part2(int x, int y) {
	int i, j, s, t;

	s = i = x;	// initialize variables with value from x
	t = j = y;  // initialize variables with value from y

	printf("function_1(x, y) = %d\nmacro_2(x, y) = %d\n\n", function_1(++i, ++j), macro_2(++s, ++t));

	// Replace the 4 '__' spaces below with the actual output observed when running the code in VS and GCC.
	printf("In VS : the result of function_1(x, y) = __ and macro_2(x, y) = __ \n"); // (5 points)
	printf("In GCC: the result of function_1(x, y) = __ and macro_2(x, y) = __ \n\n"); // (5 points)

	// Explain why Visual Studio and GCC programming environments could possibly produce a different value for the same program and for the same input.
	printf("Explanation: __________________________________________________________________\n\n"); //  (5 points)
}

// Do not edit any of the following code
int main()
{
	int x = 4, y = 5;

	printf("Part 1:\n\n");
	part1(x);
	printf("Part 2:\n\n");
	part2(x, y);

	return 0;
}