Use of the conversion specifier % g in C language

Source: Internet
Author: User
Tags float max

Question:

Compile a function, return the difference between the maximum and minimum values in a double array, and test the function in a simple program.
It's easy to have no sense about the question, but it's just a bit confusing, because the answer is

The code is as follows: Copy code

Printf ("The gap between max and min is: % gn", gap (array, WIDTH ));

What is % g? I did not record the notes in my notes-specifiers, but I did not go into the chapters in the book for details. I just classified it as a floating point.

Result output:

2.6
9.2
The dif between max and min is: 6.6

There is no extra 0, and it looks quite comfortable.

So, I understood % g, which is a good thing.

The full version I wrote:

The code is as follows: Copy code

# Include <stdio. h>
# Define WIDTH 6
Float dif (double [], int num );
Int main (void)
{
Double array [] = {4.3, 5.3, 2.6, 9.2, 2.8, 3.6 };
Printf ("The dif between max and min is: % g", dif (array, WIDTH ));
Return 0;
}
Float dif (double array [], int num)
{
Int I;
Float max, min;
For (I = 0, max = * array, min = * array; I <num; I ++ ){
If (* (array + I)> max)
Max = * (array + I );
If (* (array + I) <min)
Min = * (array + I );
 }
Printf ("% gn", min );
Printf ("% gn", max );
Return max-min;
}

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