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c++ Programming Glossary: atofstd::string to float or double http://stackoverflow.com/questions/1012571/stdstring-to-float-or-double double. I tried std string num 0.6 double temp double atof num.c_str But it always returns zero. Any other ways c share.. improve this question std string num 0.6 double temp atof num.c_str Does it for me it is a valid C syntax to convert a..
http://stackoverflow.com/questions/1596239/simple-flex-bison-c yylval atoi yytext return INTEGER 0 9 . 0 9 . 0 9 yylval.d atof yytext return FLOAT n return EOL t ignore whitespace . printf..
Truncate a decimal value in c++ http://stackoverflow.com/questions/304011/truncate-a-decimal-value-in-c sprintf sz .4lf n lf sz contains 0.6000 double lf2 atof sz lf 0.600000002 lf2 0.6000 printf .4lf lf2 print 0.6000 The..
http://stackoverflow.com/questions/3825392/string-to-float-conversion and strtof would be the obvious choices. There is also atof but like atoi it lacks a way to tell you there was an error..
C++ string to double conversion http://stackoverflow.com/questions/4754011/c-string-to-double-conversion allows you to convert from string to double easily it's atof. You need to include stdlib.h #include stdlib.h int main string.. stdlib.h int main string word openfile word double lol atof word.c_str c_str is needed to convert string to const char ..
Viewing a dynamically-allocated array with the Xcode debugger? http://stackoverflow.com/questions/484707/viewing-a-dynamically-allocated-array-with-the-xcode-debugger
How to convert a number to string and vice versa in C++ http://stackoverflow.com/questions/5290089/how-to-convert-a-number-to-string-and-vice-versa-in-c functions atoi for integers alphabetical to integer and atof for floating point values alphabetical to float . These functions.. has easy to understand documentation on both atoi and atof including how they behave in case of bad input. However the.. int i atoi si.c_str the c_str function converts double f atof sf.c_str std string to const char Use string streams this time..
Fastest way to read numerical values from text file in C++ (double in this case) http://stackoverflow.com/questions/5678932/fastest-way-to-read-numerical-values-from-text-file-in-c-double-in-this-case it the fastest possible c share improve this question atof is probably much faster it doesn't have to process the format.. exponents etc then a custom function may be faster yet. If atof is still too slow for you say so and I can clean up the code.. posting at the moment . I just remembered the problem with atof it doesn't tell you where the number ended so reading several..
Dealing with accuracy problems in floating-point numbers http://stackoverflow.com/questions/590822/dealing-with-accuracy-problems-in-floating-point-numbers sake of clarity the problem is summarized as str is 4.600 atof str is 4.5999999999999996 double mw atof str The variables used.. as str is 4.600 atof str is 4.5999999999999996 double mw atof str The variables used in the columns calculation below are..
ifstream not reading EOF character http://stackoverflow.com/questions/6512173/ifstream-not-reading-eof-character 1 line.size 1 pos line.find_first_of ' ' current.push_back atof line.substr 0 pos .c_str for int i 0 i 4 i pos line.find_first_of.. pos 1 line.size 1 pos line.find_first_of ' ' dx.push_back atof line.substr 0 pos .c_str pos line.find_first_of ' ' line line.substr.. pos 1 line.size 1 pos line.find_first_of ' ' dy.push_back atof line.substr 0 pos .c_str getline curfile line EDIT When I first..
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