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I’m trying to convert std::string to float/double.
I tried:
std::string num = "0.6";
double temp = (double)atof(num.c_str());
But it always returns zero. Any other ways?
Does it for me, it is a valid C++ syntax to convert a string to a double.
You can do it with the stringstream or boost::lexical_cast but those come with a performance penalty.
Ahaha you have a Qt project …
Extra note:
If the input data is a
const char*,QByteArray::toDoublewill be faster.