Update Makefile and comments in C files for clarity and compatibility

- Enhanced the clean target in the Makefile to provide feedback on removed files.
- Updated comments in setbits.c, invert.c, and rightrot.c to improve readability and maintain compatibility with C89/C99 standards.
- Adjusted comment formatting in dcl.c for better clarity on function parameter declarations.

Author: ohkimur

Makefile

@@ -24,6 +24,10 @@ format-check:
 check: format-check lint
 
 clean:
-	rm -rf $(EXECS) $(DEBUG_FILES)
+	@for f in $(EXECS) $(DEBUG_FILES); do \
+		if [ -e "$$f" ] || [ -d "$$f" ]; then \
+			rm -rf "$$f" && echo "Removed: $$f"; \
+		fi; \
+	done
 
 .PHONY: all lint format format-check check clean

chapter_2/exercise_2_06/setbits.c

@@ -10,8 +10,8 @@
 unsigned int setbits(int x, int p, int n, int y);
 
 int main(void) {
-    // Using hexadecimal instead of binary literals (0b...) for C89/C99 compatibility
-    // 0xFF = 0b11111111, 0x06 = 0b0110
+    // Using hexadecimal instead of binary literals (0b...) for C89/C99
+    // compatibility 0xFF = 0b11111111, 0x06 = 0b0110
     unsigned int x = 0xFF;
     unsigned int y = 0x06;
 

chapter_2/exercise_2_07/invert.c

@@ -10,8 +10,8 @@
 unsigned int invert(int x, int p, int n);
 
 int main(void) {
-    // Using hexadecimal instead of binary literals (0b...) for C89/C99 compatibility
-    // 0xD7 = 0b11010111
+    // Using hexadecimal instead of binary literals (0b...) for C89/C99
+    // compatibility 0xD7 = 0b11010111
     unsigned int x = 0xD7;
 
     printf(BYTE_TO_BINARY_PATTERN, BYTE_TO_BINARY(x));

chapter_2/exercise_2_08/rightrot.c

@@ -5,8 +5,8 @@ void printbin(unsigned int x);
 unsigned int rightrot(unsigned int x, unsigned int n);
 
 int main(void) {
-    // Using hexadecimal instead of binary literals (0b...) for C89/C99 compatibility
-    // 0xF5 = 0b11110101
+    // Using hexadecimal instead of binary literals (0b...) for C89/C99
+    // compatibility 0xF5 = 0b11110101
     unsigned int x = 0xF5;
 
     printbin(x);

chapter_5/exercise_5_18/dcl.c

@@ -6,8 +6,8 @@
 #define MAX_TOKEN_LEN 100
 #define MAX_OUT_LEN 1000
 
-// Using (void) instead of () explicitly declares these functions take no parameters
-// This is the preferred modern C style and avoids compiler warnings
+// Using (void) instead of () explicitly declares these functions take no
+// parameters This is the preferred modern C style and avoids compiler warnings
 void skip_blanks(void);
 void skip_comments(void);