% format strings

[grv575]

For a string like print '%.*f' % (prec_length, float_var)
How does python convert this to a C printf sytle format string? Is
there a way to specify the precision length for floating points in C
format strings?

 

[Erik Max Francis]

Is
there a way to specify the precision length for floating points in C
format strings?

Yes, it looks the same as in Python. Python got the notation from C.

 

[ziller]

Yes, it looks the same as in Python. Python got the notation from C.

I meant to say how does it translate the *. Python lets you use a
variable to specify the length of precision.

int f_length = 5;
float fl = 3.5
printf("%.*f", f_length, fl);

doesn't compile.

 

[Grant Edwards]

I meant to say how does it translate the *. Python lets you use a
variable to specify the length of precision.

int f_length = 5;
float fl = 3.5
printf("%.*f", f_length, fl);

doesn't compile.

Of course not. It's not valid C. The following compiles just
fine:

#include <stdio.h>

int f_length = 5;
float fl = 3.5;

void foo(void)
{
printf("%.*f",f_length, fl);
}

Not sure why you're asking C questions in c.l.p...

 

[grv575]

great thx. didn't know that was valid C. it wouldn't compile on my
end b/c of mixing C++ style include directives and C ones it looks
like.