Unusual program Output, Help

Below is the small program

Code:

#include<stdio.h>
#include<stdlib.h>

int main()
{   
    printf(" %#f\n", 415);
        
    return 0;
}

Displays OutPut as = -0.028148

Unable to understand, please help.....
I am using NetBeans 6 under Ubuntu.

with each run, it displays a random number

Where you supply 415 - that's supposed to be a reference to a float variable.

You're telling it to print a double, but you're not passing it a double.
Use 415.0 instead.

Welcome to the complete lack of type safety in printf!

you put 4 bytes on stack, but using format f - which reads 8 bytes and interprets them as double... So you get 4 random bytes of garbage in your output.
Make your number to be consistent with the format, for example 415.0

Originally Posted by Todd Burch

Where you supply 415 - that's supposed to be a reference to a float variable.

I'm not sure what you mean here, but you don't necessarily have to provide a variable in order to be able to leverage the formatting specifiers.

Example:
printf("%d\n", 5);

will print 5 to standard output.

Originally Posted by cs32

I'm not sure what you mean here, but you don't necessarily have to provide a variable in order to be able to leverage the formatting specifiers.

Rereading it - it is not that clear, but not incorrect. The others said it better.

Originally Posted by Todd Burch

Rereading it - it is not that clear, but not incorrect. The others said it better.

No sweat -- just wanted to clarify.

thanks guys,