#include		<stdio.h>

/* files3.c        1/24/96

	Since scanf() and fscanf() sometimes read past the newline
	character in search of a string or an integer, you can get
	into trouble if you don't want that to happen.  There's an
	alternative way of doing one-line-at-a-time input without
	giving up the power of scanf().
	
	1. First, let's look at the return value of scanf()/fscanf().
	   The return value is the number of successful matches
	   scanf() made.  Try the program below with "program < textfile"
	   while varying the contents of the textfile.  The
	   call to scanf() is expecting the input to contain an
	   integer, some optional white space, a string, some more
	   optional white space, and then another string.  If that's
	   what you put in "textfile", what happens with "matches"?
	   What if you don't start with an integer, or only put
	   one string after the integer, or....?
	   
	2. Put another scanf( "%s", aString ); printf( "@%s@\n", aString );
	   after the stuff below.  If "textfile"'s first line contains
	   an integer and one string, and its second line contains
	   something, how does your code behave?  Did scanf() go past
	   the first newline in search of a string, or not?

	3. Sometimes you don't want scanf() to look past the current
	   line.  One solution is to get the current line into an
	   array, like this:
	   
	   		char		line[100];
			int			i, matches;
			char		aString[50], anotherString[50];

			gets( line, 100 );
			matches = sscanf( line, "%d %s %s", &i, aString, anotherString );
	   
	   "sscanf()" takes its input from a string rather than from
	   a file (or stdin, which is a kind of file).
	   
	 4. Here's the big question.  If you do
	 
	 		scanf( "%d", &i );
			scanf( "%s", aString );
		
		instead of
		
			scanf( "%d %s", &i, aString );
			
		what happens?
		
		If you do
		
			gets( line, 100 );
			sscanf( line, "%d", &i );
			sscanf( line, "%s", aString );
		
		instead of 
		
			gets( line, 100 );
			sscanf( line, "%d %s", &i, aString );

		what happens now?
	   
*/

void main()
{
	int			i, matches;
	char		aString[100], anotherString[100];
	
	matches = scanf( "%d %s %s", &i, aString, anotherString );
	printf( "Successful matches: %d\n", matches );
	printf( "%d @%s@ @%s@\n", i, aString, anotherString );
}