C++ comments

comments.cpp

#include <stdio.h>

int main(){

	/****  1. backslash-newline  ****/

	int a = 1;
	//some comments \
	a++;
	printf("%d\n", a);

	int b = 1;
	//some comments ??/
	b++;
	printf("%d\n", b);

/\
/	some comments

/\
*
	some comments
*/

	/****  2. trigraph sequences  ****/

	/*
		----------------------------------------------------------------------------
		| trigraph | replacement | trigraph | replacement | trigraph | replacement |
		----------------------------------------------------------------------------
		| ??=      | #           | ??(      | [           | ??<      | {           |
		| ??/      | \           | ??)      | ]           | ??>      | }           |
		| ??’      | ˆ           | ??!      | |           | ??-      | ˜           |
		----------------------------------------------------------------------------
	 */
	
	printf("seems to work (but is it right??)");	// seems to work (but is it right]

	/*
		warning: trigraph ??/ ignored, use -trigraphs to enable [-Wtrigraphs]
		g++ demo.cpp -o demo -trigraphs
	 */
	

	/****  3. nested comments  ****/

	//!	/*something	/* something else */	*/

	int ans = /*/*/0*/**/1;
	printf("\n%d\n", ans);
    
	#if 0
		commments1
			#if 0
				comments2
			#endif
		commments3
	#endif

	/****  4. bad comments  ****/
	/*
		comments
	* /
	
	code = 1;	/* comments !*/

}