Handling log10:SING error

[khaledun]

I'm the beginner in c and c++ programming.when i want to calculate log10(0.0) then the program's output shows log10:SING error. i want to handle this error myself.how can i handle this?

[hamsterman]

Try this

float l = log10(.0);

if(errno == 0) std::cout << l;
else{
	std::cout << "Fail!";
	errno = 0;
}