#include"myfuncs.h"

using namespace std;

double div(double a, double b) {
   if(b!=0) {
    return a/b;
  } else {
    throw(ErrMsg("double div(double,double)","Division by zero."));
  }
}

double log(double a) {
   if(a>0) {
    return log10(a);
  } else {
    throw(ErrMsg("double log(double)","Invalid argument."));
  }
}