Mega Code Archive
Returns the base 2 logarithm for num
<![CDATA[
//Declaration: float log2f(float num);
double log2(double num);
long double log2l(long double num);
#include <math.h>
#include <stdio.h>
int main(void)
{
double val = 1.0;
do {
printf("%f %f\n", val, log2(val));
val++;
} while (val<11.0);
return 0;
}
/*
1.000000 0.000000
2.000000 1.000000
3.000000 1.584963
4.000000 2.000000
5.000000 2.321928
6.000000 2.584963
7.000000 2.807355
8.000000 3.000000
9.000000 3.169925
10.000000 3.321928
*/
]]>