Invalid conversion from 'int' to 'double*'

Question

I have this line of code:

int g = modf(ans*power, 1)*10;

And it is giving me the error:

Invalid conversion from \'int\'

Answer 1

modf(ans*power, 1) is bad

double smthng = 1.0; modf(ans*power, &smthng) is good.

http://linux.die.net/man/3/modf