working out the multiple of a number

[Unregistered]

Is there anyway of working out the multiple of an integer that the user types in

e.g. user enters 23000

I want to show it as 2.3 x 10^4

any solutions???

[zen]

Something like this -

#include <stdio.h>
#include <math.h>

int main()
{
	double a = 2300.00;

	printf("%g x 10^%d",a/pow(10,(int)log10(a)),(int)log10(a)+1);

	return 0;
}

[Salem]

> e.g. user enters 23000
> I want to show it as 2.3 x 10^4
Well the ^4 bit can easily be found by working out the length of the number (sprintf and strlen - mmm - this seems familiar.... )

Also look at printf's %e format