Ex_1.23_remcomments.c

/*  Exercise 1.23
 *
 * Program to remove comments from a C Program.
 *
 * Program should echo quotes and character constants properly
 * C comments do not nest
 *
 */

#include<stdio.h>

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

int main(void)
{
	int c,d;

	printf(" To Check /* Quoted String */ \n");

	while((c=getchar())!=EOF)
		rcomment(c);

	return 0;
}

void rcomment(int c)
{
	int d;

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

}

void incomment()
{
	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);
}