[Dev-C++] throw problems

[gpuime <gp...@pa...>]

Hello all,
	in this tiny program throw causes a crash, but I don't see why......

#include <iostream>
#inclde <cmath>

   double ln(double x) throw(char*){
if(x<=0) throw "ln error" ; return log(x) ; }

   int main(){
for(x=10;x>-11;x-=10){
   try{ cout<<ln(x)<<endl ; }
   catch(char *s){ cout<<s ; }
} }