is ln() function not declared in math library

[satellite03]

is ln() function not declared in math library.

why this does not work ?

#include<stdio.h>
#include<math.h>
int main()
{

double x = .3462;
double y = ln(x);
printf("%f",y);

}

this does not work. how can i make it to work ?

 

[hoinz]

hi,
use log() instead of ln()