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3/part2.c

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+#define ABS(x) x * (((2 * x) + 1) % 2)
+#define MAX(x, y) ((x+y) + ABS(x-y))/2
+#define TWO 2
+#define THREE 3
+#define ZERO 0
+
+
+// Part 2 exercise 2
+void main(void)
+{
+    short x_king,
+          y_king,
+          x_zariah,
+          y_zariah,
+          answer;
+
+    // If answer == '0' is TRUE, else is FALSE
+    if ((x_king - x_zariah) * (y_king - y_zariah) == ZERO){}
+}
+
+// Part 2 exercise 3
+void main(void)
+{
+    short x_king,
+          y_king,
+          x_runner,
+          y_runner,
+          answer;
+
+    // If answer == '0' is TRUE, else is FALSE
+    if (ABS(x_king - x_runner) - ABS(y_king - y_runner) == ZERO){}
+}
+
+// Part 2 exercise 4
+void main(void)
+{
+    short x_king,
+          y_king,
+          x_horseman,
+          y_horseman,
+          answer;
+
+    // If answer == '0' is TRUE, else is FALSE
+    if (ABS(x_king - x_horseman) + ABS(y_king - y_horseman) - THREE == ZERO){}
+}
+
+// Part 2 exercise 5
+void main(void)
+{
+    short a,
+          b,
+          answer;
+
+    answer = ((a+b) + ABS(a-b))/TWO;
+}