#include #pragma warning(disable : 4996) // needed in VS

// CSE 240 Spring 2022 Homework 2 Question 3 (25 points) // Note: You may notice some warnings when you compile in GCC or VS, that is okay.

#define square(x) (x * x)

#define mulMacro(a, b) (a + b + a * a + b * b + a * a * a + b * b * b)

int mulFunc(int a, int b) { return (a + b + a * a + b * b + a * a * a + b * b * b); }

// Part 1: // We want to pass the value of 6 to square and expect the result of square to be 36, why is the result 25? Correct the error (5 points) void part1(int x) {

int result; --x; // corrected result = square(x); // corrected

printf("square(6) = %d ", result);

// Why did this error occur? Please provide the answer in your own words below. printf("Explanation: x is encountered twice in the macro definition. So it increments twice "); // (2.5 points) }

// Part 2: // We want to pass decremented values of x and y to the macro and function to compare their outputs in VS and GCC. // Run this program in Visual Studio(VS) and then again in GCC. Fill the blanks below with the output values for mulFunc and mulMacro. // Then correct/edit this function so that mulFunc and mulMacro produce same correct output of 261. // (5 points) // void part2(int x, int y) { int x_copy = x, y_copy = y;

printf("mulFunc(x, y) = %d mulMacro(x, y) = %d ", mulFunc(--x, --y), mulMacro(--x_copy, --y_copy));

// Replace the 4 blank spaces below with the actual output observed when running the code in VS and GCC. // The blanks should have the answers of unedited program. Keep the answers in blanks as they were, after editing the program. printf("In VS : the result of mulFun = __ and mulMacro = __ "); // (5 points) printf("In GCC: the result of mulFun = __ and mulMacro = __ "); // (5 points)

// Explain in a short sentence why VS and GCC could possibly produce a different value for the same program and for the same input. printf("Explanation: _____ "); // (2.5 points) }

// Do not edit main() int main() { int x = 7, y = 2;

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

while (1); // needed to keep console open in VS return 0; }