From:	Eric Backus <ericb AT lsid DOT hp DOT com>
Subject:	Re: scanf woes
To:	richards AT sequent DOT com (Richard Shields)
Date:	Thu, 7 Jan 93 13:54:19 PST
Cc:	djgpp AT sun DOT soe DOT clarkson DOT edu
Mailer:	Elm [revision: 66.25]

> Has anyone had any trouble using scanf to read in a floating point value?
> 
> I tried this in my code:
> 
>     double amount;
> 
>     scanf("%f", amount);
>     printf("amount = %10.2f\n", amount);
> 
> 
> When I run the program and enter 4.25 the printf statement prints 0.00.
> 
> I have successfully used scanf to read in a string but anything else seems
> to fail.
> 
> -Rich

Unlike printf(), scanf() needs to be passed a pointer to the variable
you are assigning.  You were able to read a string because a string is
a pointer to char.  Change your program to say

	scanf("%f", &amount);

and all should work fine.
--
				Eric Backus
				ericb AT lsid DOT hp DOT com
				(206) 335-2495

- Raw text -