twenty3.c

#include<stdio.h>

void rcomment(int c);
void in_comment(void);
void echo_quote(int c);

main()
{
	int c, d;
	while ((c = getchar()) != EOF ) {
		rcomment(c);
	}
	return 0;
}

void rcomment(int c)
{
	int d;

	if (c == '/')
		if ((d = getchar()) == '*')
			in_comment();
	else if (c == '\'' || c == '"')
		echo_quote(c);
        else
		putchar(c);
}	
		 

void in_comment()
{
	int c,d;

	c = getchar();
	d = getchar();
	while (c != '*' || d != '/') {
		c = d;
		d = getchar();
	}
}

void echo_quote(int c)
{
	int d;

	putchar(c);
	while ((d = getchar()) != c) {
		putchar(d); 
		if (d == '\\')
			putchar(getchar());
	}
	putchar(d);			
}