How Do I Convert a Cstring to a Double in C++?
Unicode Support Would Be Nice Also. Thanks! 5 4 Answers a Cstring Can Convert to an Lpctstr, Which Is Basically a Const Char* (Const Wchar_T* in Unicode...
How do I convert a CString to a double in C++?
Unicode support would be nice also.
Thanks!
4 Answers
A CString can convert to an LPCTSTR, which is basically a const char* (const wchar_t* in Unicode builds).
Knowing this, you can use atof():
CString thestring("13.37");
double d = atof(thestring).
...or for Unicode builds, _wtof():
CString thestring(L"13.37");
double d = _wtof(thestring).
...or to support both Unicode and non-Unicode builds...
CString thestring(_T("13.37"));
double d = _tstof(thestring).
(_tstof() is a macro that expands to either atof() or _wtof() based on whether or not _UNICODE is defined)
You can convert anything to anything using a std::stringstream. The only requirement is that the operators >> and << be implemented. Stringstreams can be found in the <sstream> header file.
std::stringstream converter;
converter << myString;
converter >> myDouble;
with the boost lexical_cast library, you do
#include <boost/lexical_cast.hpp>
using namespace boost;
...
double d = lexical_cast<double>(thestring);
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