C++ convert a string to a number
BOOST_FOREACH(const std::vector<std::string>& row, instruments)
int bid_quantity = atoi( row.at(6) );
double offer_price = atof( row.at(7) );
int offer_quantity = atoi( row.at(8) );
Application.cpp:360: error: cannot convert âconst std::basic_string<char, std::char_traits<char>, std::allocator<char> >â to âconst char*â for argument â1â to
âdouble strtod(const char*, char**)â
Application.cpp:361: error: cannot convert âconst std::basic_string<char, std::char_traits<char>, std::allocator<char> >â to âconst char*â for argument â1â to âint atoi(const char*)â
Application.cpp:362: error: cannot convert âconst std::basic_string<char, std::char_traits<char>, std::allocator<char> >â to âconst char*â for argument â1â to âdouble atof(const char*)â
Application.cpp:363: error: cannot convert âconst std::basic_string<char, std::char_traits<char>, std::allocator<char> >â to âconst char*â for argument â1â to âint atoi(const char*)â
- https://www.experts-exchange.com/questions/27853165/C-convert-a-string-to-a-number.html copy
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- evilrix (3 comments)
std::vector< std::string > rows;
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double bid_price = atof( char_bid_price ) ;
What is considered best or most efficient way?
You mean, like an array tuples?
Don't use unsafe c functions when working with C++ types. Either use boost lexical cast or, if that's not possible, use a stringstream to perform the conversion.
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